Quick Links : The Mindat Manual The Rock H. Currier Digital Library Mindat Newsletter [Free Download]

Home Page About Mindat The Mindat Manual History of Mindat Copyright Status Who We Are Contact Us Advertise on Mindat

Donate to Mindat Corporate Sponsorship Sponsor a Page Sponsored Pages Mindat Advertisers Advertise on Mindat

Learning Center What is a mineral?The most common minerals on earth Information for Educators Mindat Articles The Elements The Rock H. Currier Digital Library Geologic Time Explore Fossils

Minerals by Properties Minerals by Chemistry Mineral Visual Explorer Advanced Locality Search Random Mineral Random Locality Search by minID Localities Near Me Search Articles Search Glossary More Search Options

The Mindat Manual Add a New Photo Rate Photos Locality Edit Report Coordinate Completion Report Add Glossary Item

Mining Companies Statistics Users Mineral Museums Clubs & Organizations Mineral Shows & Events The Mindat Directory Device Settings The Mineral Quiz Time Machine

Photo Search Photo Galleries Search by Color Photo Colour Explorer New Photos Today New Photos Yesterday Members' Photo Galleries Past Photo of the Day Gallery Photography

Feldspar Group

A group of related mineral species

This page is currently not sponsored. Click here to sponsor this page.

Photos of Feldspar Group (8460)Recorded Ages and Analyses Discuss Feldspar Group

Feldspar Group Gallery Search Photos of Feldspar Group

Edit Feldspar Group Add Synonym Edit CIF structures Clear Cache

Orthoclase

Toce Waterfall, La Frua, Formazza, Formazza Valley, Verbano-Cusio-Ossola Province, Piedmont, Italy

Amazonite

Pikes Peak, El Paso County, Colorado, USA

Albite

Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada

Orthoclase

Toce Waterfall, La Frua, Formazza, Formazza Valley, Verbano-Cusio-Ossola Province, Piedmont, Italy

Amazonite

Pikes Peak, El Paso County, Colorado, USA

Albite

Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada

Orthoclase

Toce Waterfall, La Frua, Formazza, Formazza Valley, Verbano-Cusio-Ossola Province, Piedmont, Italy

Amazonite

Pikes Peak, El Paso County, Colorado, USA

Hide all sections | Show all sections

About Feldspar GroupHide

As a Commodity:

Feldspar

Name:

The name is derived from the German term 'Feldspat'. For centuries, miners generally referred to minerals and rocks as "Spat" if they had the property of being particularly easy to (completely) split. The perfection of cleavage was often evident from the existing, visible cleavage cracks and from the fact that fine flakes (“Spaten”) detached from the mineral or rock body when struck with a hammer. The term feldspar came into being around the middle of the 18th century when people in mineralogy learned to differentiate between the different types of minerals more precisely.
There are various theories about the exact origin of this name. In 1783, for example, Urban Brückmann asked himself whether feldspar could have received its name based on its characteristic way of occurrence in the form of fields or patches in granite and other types of rock (never as entire veins, rocks, or mountains). René-Just Haüy, on the other hand, suggested in his 1804 work "Traité de minéralogie" that the name could have been chosen based on the fact that feldspar fragments were regularly found in the fields. The feldspar would therefore be understood as “spar from the fields” and an indication that feldspar gradually turned into arable soil through weathering.

Feldspar is the name of a group of aluminium silicate minerals, and is collectively the most common mineral group found on the surface of the Earth. The major rock-forming minerals in the feldspar group include albite, anorthite, orthoclase and microcline.

In petrology, the group is split into two major subgroups:

Alkali feldspar - feldspar minerals poor in calcium, and mostly rich in potassium. At high temperature, the alkali feldspars form a series from sanidine to high albite; the series is incomplete at low temperature. Some workers include barium feldspars (celsian and hyalophane) and probably the rubidium feldspar rubicline, as alkali feldspars.

Plagioclase - the albite to anorthite series.

Feldspars may contain very minor amounts of OH groups, considered as defects (e.g., Yang et al., 2015).

Unique IdentifiersHide

Mindat ID:

1624

Long-form identifier:

mindat:1:1:1624:3

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.

Symbol	Source	Reference for Standard
Fsp	IMA–CNMNC	Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43
Fsp	Siivolam & Schmid (2007)	Siivolam, J. and Schmid, R. (2007) Recommendations by the IUGS Subcommission on the Systematics of Metamorphic Rocks: List of mineral abbreviations. Web-version 01.02.07. IUGS Commission on the Systematics in Petrology. download
Fsp	Whitney & Evans (2010)	Whitney, D.L. and Evans, B.W. (2010) Abbreviations for names of rock-forming minerals. American Mineralogist, 95, 185–187 doi:10.2138/am.2010.3371

Pronunciation of Feldspar GroupHide

Pronunciation:

Play	Recorded by	Country
	Jolyon Ralph	United Kingdom

View all 275 analyses with additional filters.

Age distributionHide

Recorded ages:

Neoarchean to Quaternary : 2800 Ma to 0.00129 ± 0.00056 Ma - based on 275 recorded ages.

Sample ages:

Sample ID	Recorded age	Geologic Time	Dating method
1	0.00129 ± 0.00056 Ma	Holocene	Ar/Ar
2	12.71 ± 0.13 Ma	Miocene	40Ar/39Ar
3	16.9 ± 0.3 Ma	Miocene	K-Ar
4	20.8 ± 0.2 to 25.5 ± 0.2 Ma	Cenozoic	K-Ar
5	28.41 ± 0.05 Ma	Oligocene	40Ar/39Ar
6	28.92 ± 0.04 Ma	Oligocene	40Ar/39Ar
7	29.21 ± 0.08 Ma	Oligocene	40Ar/39Ar
8	29.58 ± 0.08 Ma	Oligocene	40Ar/39Ar
9	30.17 ± 0.22 Ma	Oligocene	40Ar/39Ar
10	31.02 ± 0.13 Ma	Oligocene	40Ar/39Ar
11	31.63 ± 0.12 Ma	Oligocene	40Ar/39Ar
12	31.9 ± 0.2 Ma	Oligocene	40Ar/39Ar
13	32.65 ± 0.05 Ma	Oligocene	40Ar/39Ar
14	34.7 ± 1.2 Ma	Eocene	K-Ar
15	48.88 ± 0.54 Ma	Eocene	Ar-Ar
16	63.1 ± 1.5 Ma	Paleocene	K-Ar
17	130.8 ± 1.4 Ma	Early/Lower Cretaceous	Rb-Sr
18	231 ± 3 Ma	Late/Upper Triassic	K-Ar
19	515 ± 36 Ma	Cambrian Series 2	Rb-Sr
20	2800 Ma	Neoarchean	Rb-Sr

Sample references:

ID	Type	Locality	Reference	Notes
1		Laacher See Volcanic Complex, Germany	van den Bogaard, Paul (1995) 40Ar/39Ar ages of sanidine phenocrysts from Laacher See Tephra (12,900 yr BP): Chronostratigraphic and petrological significance. Earth and Planetary Science Letters, 133 (1) 163-174 doi:10.1016/0012-821x(95)00066-l
2		Roşia Montană, Roșia Montană, Alba County, Romania	Manske S, Ullrich T, Reynolds T J, O'Connor G (2004): Vein sets and hydrothermal alteration in the Cetate-Carnic Area, Roșia Montană district, Romania. Rom. J. Miner. Depos. 81, 122-125.
3		Tonopah Mining District, San Antonio Mountains, Nye County, Nevada, USA	Silberman, M. L., Bonham, H. F. Jr., Garside, L. J., Ashley, R. P. (1978) Radiometric ages of volcanic and plutonic rocks and hydrothermal alteration-mineralization in the Tonopah Mining District and vicinity, Nye and Esmerelda Counties, Nevada. United States Department of the Interior Geological Survey Open-File Report 78-841. 1-48.
4		Focal Peak Volcano, Tweed Volcano Group, Australia	EWART, A. (1982) Petrogenesis of the Tertiary Anorogenic Volcanic Series of Southern Queensland, Australia, in the Light of Trace Element Geochemistry and O, Sr and Pb Isotopes. Journal of Petrology, 23 (3) 344-382 doi:10.1093/petrology/23.3.344
5		Gold Star pit, Altman, Cripple Creek Mining District, Teller County, Colorado, USA	Kelley, Karen D., Romberger, Samuel B., Beaty, David W., Pontius, Jeffrey A., Snee, Lawrence W., Stein, Holly J., Thompson, Tommy B. (1998) Geochemical and geochronological constraints on the genesis of Au-Te deposits at Cripple Creek, Colorado. Economic Geology, 93 (7) 981-1012 doi:10.2113/gsecongeo.93.7.981
6		" "	Kelley, Karen D., Romberger, Samuel B., Beaty, David W., Pontius, Jeffrey A., Snee, Lawrence W., Stein, Holly J., Thompson, Tommy B. (1998) Geochemical and geochronological constraints on the genesis of Au-Te deposits at Cripple Creek, Colorado. Economic Geology, 93 (7) 981-1012 doi:10.2113/gsecongeo.93.7.981
7		" "	Kelley, Karen D., Romberger, Samuel B., Beaty, David W., Pontius, Jeffrey A., Snee, Lawrence W., Stein, Holly J., Thompson, Tommy B. (1998) Geochemical and geochronological constraints on the genesis of Au-Te deposits at Cripple Creek, Colorado. Economic Geology, 93 (7) 981-1012 doi:10.2113/gsecongeo.93.7.981
8		" "	Kelley, Karen D., Romberger, Samuel B., Beaty, David W., Pontius, Jeffrey A., Snee, Lawrence W., Stein, Holly J., Thompson, Tommy B. (1998) Geochemical and geochronological constraints on the genesis of Au-Te deposits at Cripple Creek, Colorado. Economic Geology, 93 (7) 981-1012 doi:10.2113/gsecongeo.93.7.981
9		" "	Kelley, Karen D., Romberger, Samuel B., Beaty, David W., Pontius, Jeffrey A., Snee, Lawrence W., Stein, Holly J., Thompson, Tommy B. (1998) Geochemical and geochronological constraints on the genesis of Au-Te deposits at Cripple Creek, Colorado. Economic Geology, 93 (7) 981-1012 doi:10.2113/gsecongeo.93.7.981
10		Cresson open pit, Cripple Creek, Cripple Creek Mining District, Teller County, Colorado, USA	Kelley, Karen D., Romberger, Samuel B., Beaty, David W., Pontius, Jeffrey A., Snee, Lawrence W., Stein, Holly J., Thompson, Tommy B. (1998) Geochemical and geochronological constraints on the genesis of Au-Te deposits at Cripple Creek, Colorado. Economic Geology, 93 (7) 981-1012 doi:10.2113/gsecongeo.93.7.981
11		Gold Star pit, Altman, Cripple Creek Mining District, Teller County, Colorado, USA	Kelley, Karen D., Romberger, Samuel B., Beaty, David W., Pontius, Jeffrey A., Snee, Lawrence W., Stein, Holly J., Thompson, Tommy B. (1998) Geochemical and geochronological constraints on the genesis of Au-Te deposits at Cripple Creek, Colorado. Economic Geology, 93 (7) 981-1012 doi:10.2113/gsecongeo.93.7.981
12		Cripple Creek, Cripple Creek Mining District, Teller County, Colorado, USA	Kelley, Karen D., Romberger, Samuel B., Beaty, David W., Pontius, Jeffrey A., Snee, Lawrence W., Stein, Holly J., Thompson, Tommy B. (1998) Geochemical and geochronological constraints on the genesis of Au-Te deposits at Cripple Creek, Colorado. Economic Geology, 93 (7) 981-1012 doi:10.2113/gsecongeo.93.7.981
13		" "	Kelley, Karen D., Romberger, Samuel B., Beaty, David W., Pontius, Jeffrey A., Snee, Lawrence W., Stein, Holly J., Thompson, Tommy B. (1998) Geochemical and geochronological constraints on the genesis of Au-Te deposits at Cripple Creek, Colorado. Economic Geology, 93 (7) 981-1012 doi:10.2113/gsecongeo.93.7.981
14		Round Mountain Mining District, Toquima Range, Nye County, Nevada, USA	Shawe, D. R., Marvin, R. F., Andriessen, P. A. M., Mehnert, H. H., Merritt, V. M. (1986) Ages of igneous and hydrothermal events in the Round Mountain and Manhattan gold districts, Nye County, Nevada. Economic Geology, 81 (2) 388-407 doi:10.2113/gsecongeo.81.2.388
15		Rongnido, Damxung Co., Lhasa, Tibet, China	Gao, Y., Yang, Z., Hou, Z., Wei, R., Meng, X., & Tian, S. (2010). Eocene potassic and ultrapotassic volcanism in south Tibet: new constraints on mantle source characteristics and geodynamic processes. Lithos, 117(1-4), 20-32.
16		Manhattan Mining District, Toquima Range, Nye County, Nevada, USA	Shawe, D. R., Marvin, R. F., Andriessen, P. A. M., Mehnert, H. H., Merritt, V. M. (1986) Ages of igneous and hydrothermal events in the Round Mountain and Manhattan gold districts, Nye County, Nevada. Economic Geology, 81 (2) 388-407 doi:10.2113/gsecongeo.81.2.388
17		Mount Tchivira, Quilengues, Huíla Province, Angola	Allsopp, H. L., & Hargraves, R. B. (1985). Rb-Sr ages and palaeomagnetic data for some Angolan alkaline intrusives. Transactions of the Geological Society of South Africa, 88(2), 295-299.	from nepheline syenite
18	WC/1	Wheal Cock, Botallack Mine, Botallack, St Just, Cornwall, England, UK	Halliday, A. N. (1980). The timing of early and main stage ore mineralization in Southwest Cornwall. Economic Geology, 75(5), 752-759.
19	4	Rubikon Mine, Okongava Ost Farm 72, Karibib Constituency, Erongo Region, Namibia	Haack, U., & Gohn, E. (1988). Rb-Sr data on some pegmatites in the Damara Orogen, Namibia. Communications of the Geological Survey of South West Africa/Namibia, 4, 15-19.
20		Wodgina Tantalite Mine, Wodgina, Abydos Station, Port Hedland Shire, Western Australia, Australia	Sweetapple, Marcus T., Collins, Peter L. F. (2002) Genetic Framework for the Classification and Distribution of Archean Rare Metal Pegmatites in the North Pilbara Craton, Western Australia. Economic Geology, 97 (4) 873-895 doi:10.2113/gsecongeo.97.4.873

Chemical AnalysisHide

Oxide wt%:

Showing 12 of 16 analyses on this page.

	1	2	3	4	5	6	7	8	9	10	11	12
SiO₂	66.31 %	68.65 %	63.98 %	64.85 %	62.69 %	66.80 %	65.99 %	43.72 %	43.83 %	54.03 %	65.62 %	63.27 %
Al₂O₃	20.61 %	19.33 %	22.14 %	21.41 %	23.80 %	20.21 %	19.96 %	36.12 %	35.64 %	29.04 %	18.48 %	23.27 %
MgO	0.07 %		0.04 %	0.09 %		0.02 %						0.13 %
CaO	0.41 %		3.10 %	2.64 %	5.03 %	0.72 %		19.11 %	19.81 %	11.93 %	0.06 %	3.93 %
MnO	0.00 %		0.09 %	0.08 %							0.01 %	0.01 %
FeO	0.02 %		0.10 %	0.24 %		0.21 %						0.05 %
Na₂O	11.61 %	11.77 %	9.64 %	10.20 %	8.66 %	9.42 %	11.34 %	0.59 %	0.25 %	4.80 %	3.27 %	9.23 %
K₂O	0.11 %			0.04 %	0.15 %	1.50 %	1.45 %	0.01 %	0.01 %		11.95 %	0.19 %
TiO₂			0.16 %	0.03 %
Cr₂O₃				0.06 %
P₂O₅						0.02 %		0.02 %
H₂O							1.04 %
SO₃								0.01 %
Fe₂O₃								0.06 %			0.14 %
SrO								0.22 %
BaO								0.02 %
Total:	99.14 %	99.75 %	99.25 %	99.64 %	100.33 %	98.9 %	99.78 %	99.88 %	99.54 %	99.8 %	99.53 %	100.08 %

Empirical formulas:

Sample ID	Empirical Formula
2	Na_1.00Al_1.00Si_3.00O₈
13	(Na_0.88Ca_0.13) E_1.01 Al_1.08Si_2.91O₈
3	(Na_0.33 Ca_0.15) Al_1.16Si_2.84O₈
4	Na_0.79 Ca_0.21Al_1.17Si_2.87O₈
5	Na_0.74 Ca_0.24Al_1.24Si_2.76O₈
14	Ab₆₉An₃₁
8	(Ca_0.95Na_0.05Sr_0.01)[Si_2.03Al_1.97O₈]
9	Na_0.07 Ca_0.94Al_1.96Si_2.03O₈
10	Na_0.42 Ca_0.58Al_1.55Si_2.44O₈
11	K_0.96Na_0.04AlSi₃O₈
15	(Ba_0.911K_0.059Ca_0.042Na_0.010)Σ_1.022Al_1.891Fe³⁺_0.072Si_2.034O₈

Sample references:

ID	Type	Locality	Reference	Notes
1		Beluga sapphire property, Kimmirut, Baffin Island, Qikiqtaaluk Region, Nunavut, Canada	Belley, Philippe M., Dzikowski, Tashia J., Fagan, Andrew, Cempírek, Jan, Groat, Lee A., Mortensen, James K., Fayek, Mostafa, Giuliani, Gaston, Fallick, Anthony E., Gertzbein, Paul (2017) Origin Of Scapolite-Hosted Sapphire (Corundum) Near Kimmirut, Baffin Island, Nunavut, Canada. The Canadian Mineralogist, 55 (4) 669-699 doi:10.3749/canmin.1700018
2	Ab-10sym	Kovalo eclogites, Kechros, Arriana, Rhodope, Eastern Macedonia and Thrace, Greece	Mposkos, E.; Baziotis, I.; Proyer, A. (2011) Pressure–temperature evolution of eclogites from the Kechros complex in the Eastern Rhodope (NE Greece). International Journal of Earth Sciences, 101 (4). 973-996 doi:10.1007/s00531-011-0699-2	EMPA analysis of albite from amphibole+plagioclase symplectite in an eclogite
3	Plagioclase inc ga	Eissee eclogite, Timmelbach valley, Prägraten am Großvenediger, Lienz District, Tyrol, Austria	Hoschek, Gert (2004) Comparison of calculated P-T pseudosections for a kyanite eclogite from the Tauern Window, Eastern Alps, Austria. European Journal of Mineralogy, 16 (1) 59-72 doi:10.1127/0935-1221/2004/0016-0059	EMPA analysis of an albite inclusion in garnet from a kyanite-eclogite.
4	2015	Steinsteg eclogite, Frosnitz valley, Matrei in Osttirol, Lienz District, Tyrol, Austria	Hoschek, G (2001) Thermobarometry of metasediments and metabasites from the Eclogite zone of the Hohe Tauern, Eastern Alps, Austria. Lithos, 59 (3) 127-150 doi:10.1016/s0024-4937(01)00063-9	EMPA analysis of retrograde plagioclase from a post-eclogite facies mica-schist
5	OBI3a	Obidim eclogite, Bansko Municipality, Blagoevgrad Province, Bulgaria	Janák, M.; Froitzheim, N.; Georgiev, N.; Nagel, T. J.; Sarov, S. (2011) P-T evolution of kyanite eclogite from the Pirin Mountains (SW Bulgaria): implications for the Rhodope UHP Metamorphic Complex. Journal of Metamorphic Geology, 29 (3). 317-332 doi:10.1111/j.1525-1314.2010.00920.x	EMPA analysis ( State Geological Institute of Dionyz Stur in Bratislava).of an retrograde albite from a symplectite after clino-pyroxene from a kyanite-eclogite.
6	A-3	Kawadgaon-Challanpara pegmatite field, Dantewada District, Chhattisgarh, India	Singh, Yamuna, Pandit, P. S. C., Bagora, Sanjay, Jain, P. K. (2017) Mineralogy, geochemistry, and genesis of co-genetic granite-pegmatite-hosted rare metal and rare earth deposits of the Kawadgaon area, Bastar craton, Central India. Journal of the Geological Society of India, 89 (2) 115-130 doi:10.1007/s12594-017-0574-2	Albite from granite pegmatite. EMPA analysis
7		Eudidymite-Epididymite locality, Vesle Arøya, Larvik Commune, Vestfold, Norway	Sjögren, H. (1899) A chemical investigation of some minerals from Lille Arøe and Øvre Arøe in the firth of Langesund. Bulletin of the Geological Institution of the University of Upsala, 4. 227-230	Wet-chemical
8	pt. 17	Corundum locality, Anavoha South, Fotadrevo Commune, Ampanihy District, Atsimo-Andrefana, Madagascar	Frank K. Mazdab Collection	corundum-bearing amphibolite (tschermakite+anorthite)
9	OBI3d	Obidim eclogite, Bansko Municipality, Blagoevgrad Province, Bulgaria	Janák, M.; Froitzheim, N.; Georgiev, N.; Nagel, T. J.; Sarov, S. (2011) P-T evolution of kyanite eclogite from the Pirin Mountains (SW Bulgaria): implications for the Rhodope UHP Metamorphic Complex. Journal of Metamorphic Geology, 29 (3). 317-332 doi:10.1111/j.1525-1314.2010.00920.x	EMPA analysis ( State Geological Institute of Dionyz Stur in Bratislava).of an retrograde anorthite after kyanite from a kyanite-eclogite.
10	Pl-82	Kovalo eclogites, Kechros, Arriana, Rhodope, Eastern Macedonia and Thrace, Greece	Mposkos, E.; Baziotis, I.; Proyer, A. (2011) Pressure–temperature evolution of eclogites from the Kechros complex in the Eastern Rhodope (NE Greece). International Journal of Earth Sciences, 101 (4). 973-996 doi:10.1007/s00531-011-0699-2	EMPA analysis of plagioclase from a retrogressed eclogite.
11	562	Birch Portage pegmatites, Jan Lake, Saskatchewan, Canada	Dennis Radcliffe (1964) THE GEOLOGY OF THE BIRCH PORTAGE BERYL PEGMATITE DEPOSIT, SASKATCHEWAN. Master, University of Alberta, Edmonton, Alberta, Canada.	Pegmatite microcline Analysed by a combination of methods: X-ray fluorescence (major elements) Flame photometry (alkalis) Wet chemical analysis (BeO, separations) X-ray diffraction (structural parameters)
12		Beluga sapphire property, Kimmirut, Baffin Island, Qikiqtaaluk Region, Nunavut, Canada	Belley, Philippe M., Dzikowski, Tashia J., Fagan, Andrew, Cempírek, Jan, Groat, Lee A., Mortensen, James K., Fayek, Mostafa, Giuliani, Gaston, Fallick, Anthony E., Gertzbein, Paul (2017) Origin Of Scapolite-Hosted Sapphire (Corundum) Near Kimmirut, Baffin Island, Nunavut, Canada. The Canadian Mineralogist, 55 (4) 669-699 doi:10.3749/canmin.1700018	variety oligoclase
13	Pl-75sym	Kovalo eclogites, Kechros, Arriana, Rhodope, Eastern Macedonia and Thrace, Greece	Mposkos, E.; Baziotis, I.; Proyer, A. (2011) Pressure–temperature evolution of eclogites from the Kechros complex in the Eastern Rhodope (NE Greece). International Journal of Earth Sciences, 101 (4). 973-996 doi:10.1007/s00531-011-0699-2	EMPA analysis of albite from amphibole+plagioclase symplectite in an eclogite
14	U1428-697	Kosavankovilpatti, Madurai District, Tamil Nadu, India	Yadav, Roopali; Prakash, Divya; Kumar Rai, Swapnil; K. Yadav, Manoj; Kumar Singh, Pradip; Jaiswal, Srishti (2021) Decompression Textures in Garnet–Cordierite Gneiss from Kosavankovilpatti, Southern India: Constraints from Reaction Textures and Phase Equilibria Modelling. Geologica Carpathica, 72 (4). doi:10.31577/geolcarp.72.4.1	Plagioclase from a granulite facies cordierite-garnet gneiss. EMPA analysis
15	Type Specimen	Gurim anticline, Hatrurim Basin, Tamar Regional Council, Beersheba Subdistrict, Southern District, Israel	Galuskina, Irina O., Galuskin, Evgeny V., Vapnik, Yevgeny, Prusik, Krystian, Stasiak, Marta, Dzierżanowski, Piotr, Murashko, Mikhail (2017) Gurimite, Ba₃(VO₄)₂ and hexacelsian, BaAl₂Si₂O₈ – two new minerals from schorlomite-rich paralava of the Hatrurim Complex, Negev Desert, Israel. Mineralogical Magazine, 81 (4) 1009-1019 doi:10.1180/minmag.2016.080.147

Crystal StructureHide

Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4

View
CIF File Best | x | y | z | a | b | c

Rotation
Stop | Start

Labels
Console Off | On | Grey | Yellow

Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure

ID	Species	Reference	Year	Locality	Pressure (GPa)	Temp (K)
0005216	Microcline	Blasi A, De Pol Blasi C, Zanazzi P F (1987) A re-examination of the Pellotsalo microcline: Mineralogical implications and genetic considerations The Canadian Mineralogist 25 527-537	1987		0	293
0000962	Microcline	Griffen D T, Johnson B T (1984) Strain in triclinic alkali feldspars: a crystal structure study intermediate American Mineralogist 69 1072-1077	1984		0	293
0000194	Microcline	Bailey S W (1969) Refinement of an intermediate microcline structure American Mineralogist 54 1540-1545	1969		0	293
0000536	Albite	Prewitt C T, Sueno S, Papike J J (1976) The crystal structures of high albite and monalbite at high temperatures feldspar American Mineralogist 61 1213-1225	1976	synthetic	0	297
0000715	Albite	Winter J K, Okamura F P, Ghose S (1979) A high-temperature structural study of high albite, monalbite, and the analbite - monalbite phase transition American Mineralogist 64 409-423	1979	Tiburon, Marin County, California, USA	0	298
0020564	Sanidine	Ohashi Y, Finger LW (1974) Refinement of the crystal structure of sanidine at 25 and 400C Carnegie Institution of Washington: Yearbook 73 539-544	1974	Laacher See, Eifel District, Germany	0	298
0020555	Sanidine	Angel R J, Ross N L, Zhao J, Sochalski-Kolbus L, Kruger H, Schmidt B C (2013) Structural controls on the anisotropy of tetrahedral frameworks: the example of monoclinic feldspars European Journal of Mineralogy 25 597-614	2013	Synthetic	0	293
0020554	Sanidine	Angel R J, Ross N L, Zhao J, Sochalski-Kolbus L, Kruger H, Schmidt B C (2013) Structural controls on the anisotropy of tetrahedral frameworks: the example of monoclinic feldspars European Journal of Mineralogy 25 597-614	2013	Synthetic	0	293
0020508	Sanidine	Angel R J, Ross N L, Zhao J, Sochalski-Kolbus L, Kruger H, Schmidt B C (2013) Structural controls on the anisotropy of tetrahedral frameworks: the example of monoclinic feldspars European Journal of Mineralogy 25 597-614	2013	Unknown	0	293
0020542	Orthoclase	Angel R J, Ross N L, Zhao J, Sochalski-Kolbus L, Kruger H, Schmidt B C (2013) Structural controls on the anisotropy of tetrahedral frameworks: the example of monoclinic feldspars European Journal of Mineralogy 25 597-614	2013	Unknown	0	293
0020541	Orthoclase	Angel R J, Ross N L, Zhao J, Sochalski-Kolbus L, Kruger H, Schmidt B C (2013) Structural controls on the anisotropy of tetrahedral frameworks: the example of monoclinic feldspars European Journal of Mineralogy 25 597-614	2013	Unknown	0	293
0020540	Orthoclase	Angel R J, Ross N L, Zhao J, Sochalski-Kolbus L, Kruger H, Schmidt B C (2013) Structural controls on the anisotropy of tetrahedral frameworks: the example of monoclinic feldspars European Journal of Mineralogy 25 597-614	2013	Unknown	0	293
0020509	Orthoclase	Angel R J, Ross N L, Zhao J, Sochalski-Kolbus L, Kruger H, Schmidt B C (2013) Structural controls on the anisotropy of tetrahedral frameworks: the example of monoclinic feldspars European Journal of Mineralogy 25 597-614	2013	Unknown	0	293
0019485	Svyatoslavite	Krivovichev S V, Shcherbakova E P, Nishanbaev T P (2012) The crystal structure of svyatoslavite and evolution of complexity during crystallization of a CaAl2Si2O8 melt: A structural automata description The Canadian Mineralogist 50 585-592	2012	mine #45 near Kopeysk, Chelyabinsk area, southern Urals, Russia	0	293
0007255	Sanidine	Menna M, Tribaudino M, Renzulli A (2008) Al-Si order and spinodal decomposition texture of sanidine from igneous clasts of Stromboli (southern Italy): insights into the timing between the emplacement of a shallow basic sheet intrusion and the eruption of related ejecta European Journal of Mineralogy 20 183-190	2008	Stromboli volcano, southern Italy	0	293
0004407	Slawsonite	Benna P, Nestola F, Ballaran T B, Balic-Zunic T, Lundegaard L F, Bruno E (2007) The high-pressure structural configurations of Ca0.2Sr0.8Al2Si2O8 feldspar: The I-1-I2/c and I2/c-P2_1/c phase transitions American Mineralogist 92 1190-1199	2007	synthetic	0.0001	293
0020559	Sanidine	Ackermann S, Kunz M, Armbruster T, Schefer J, Hanni H (2004) Cation distribution in a Fe-bearing K-feldspar from Itrongay, Madagascar: A combined neutron- and X-ray single-crystal diffraction study Schweizerische Mineralogische und Petrographische Mitteilungen 84 345-354	2004	Itrongay, Madagascar	0	293
0020558	Sanidine	Ackermann S, Kunz M, Armbruster T, Schefer J, Hanni H (2004) Cation distribution in a Fe-bearing K-feldspar from Itrongay, Madagascar: A combined neutron- and X-ray single-crystal diffraction study Schweizerische Mineralogische und Petrographische Mitteilungen 84 345-354	2004	Itrongay, Madagascar	0	293
0020557	Sanidine	Ackermann S, Kunz M, Armbruster T, Schefer J, Hanni H (2004) Cation distribution in a Fe-bearing K-feldspar from Itrongay, Madagascar: A combined neutron- and X-ray single-crystal diffraction study Schweizerische Mineralogische und Petrographische Mitteilungen 84 345-354	2004	Itrongay, Madagascar	0	293
0014559	Rubicline	Kyono A, Kimata M (2001) Refinement of the crystal structure of a synthetic non-stoichiometric Rb-feldspar Mineralogical Magazine 65 523-531	2001	synthetic	0	293
0002652	Slawsonite	Benna P, Bruno E (2001) Single-crystal in situ high-temperature structural investigation on strontium feldspar American Mineralogist 86 690-696	2001	synthetic	0	293
0012862	Sanidine	Gualtieri A F (2000) Accuracy of XRPD QPA using the combined Rietveld-RIR method Journal of Applied Crystallography 33 267-278	2000	Latera, Viterbo, Italy	0	293
0012863	Albite	Gualtieri A F (2000) Accuracy of XRPD QPA using the combined Rietveld-RIR method Journal of Applied Crystallography 33 267-278	2000	Baveno, Novara, Italy	0	293
0002271	Albite	Meneghinello E, Alberti A, Cruciani G (1999) Order-disorder process in the tetrahedral sites af albite American Mineralogist 84 1144-1151	1999	Stintino, Sardinia, Italy	0	293
0002270	Albite	Meneghinello E, Alberti A, Cruciani G (1999) Order-disorder process in the tetrahedral sites af albite American Mineralogist 84 1144-1151	1999	Stintino, Sardinia, Italy	0	293
0002269	Albite	Meneghinello E, Alberti A, Cruciani G (1999) Order-disorder process in the tetrahedral sites af albite American Mineralogist 84 1144-1151	1999	Stintino, Sardinia, Italy	0	293
0002268	Albite	Meneghinello E, Alberti A, Cruciani G (1999) Order-disorder process in the tetrahedral sites af albite American Mineralogist 84 1144-1151	1999	Stintino, Sardinia, Italy	0	293
0002267	Albite	Meneghinello E, Alberti A, Cruciani G (1999) Order-disorder process in the tetrahedral sites af albite American Mineralogist 84 1144-1151	1999	Stintino, Sardinia, Italy	0	293
0002266	Albite	Meneghinello E, Alberti A, Cruciani G (1999) Order-disorder process in the tetrahedral sites af albite American Mineralogist 84 1144-1151	1999	Stintino, Sardinia, Italy	0	293
0002265	Albite	Meneghinello E, Alberti A, Cruciani G (1999) Order-disorder process in the tetrahedral sites af albite American Mineralogist 84 1144-1151	1999	Stintino, Sardinia, Italy	0	293
0002264	Albite	Meneghinello E, Alberti A, Cruciani G (1999) Order-disorder process in the tetrahedral sites af albite American Mineralogist 84 1144-1151	1999	Stintino, Sardinia, Italy	0	293
0020561	Sanidine	Kimata M, Saito S, Shimizu M, Iida I, Matsui T (1996) Low-temperature structures of orthoclase and sanidine Neues Jahrbuch fur Mineralogie, Abhandlungen 171 199-213	1996	Volkesfeld, Eifel, Germany	0	293
0020549	Orthoclase	Kimata M, Saito S, Shimizu M, Iida I, Matsui T (1996) Low-temperature structures of orthoclase and sanidine Neues Jahrbuch fur Mineralogie, Abhandlungen 171 199-213	1996	Itrongay, Madagascar	0	293
0020569	Sanidine	Marsii I M, Organova N I, Rozhdestvenskaya I V (1993) Verification of the crystalline structure for sanidines Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva 2 85-89	1993	Mongolia	0	293
0020568	Sanidine	Marcille I M, Organova N I, Rozhdestvenskaya I V (1993) Verification of the crystalline structure for sanidines Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva 2 85-89	1993	Khibiny Massif, Kola Peninsula, Russia	0	293
0005273	Sanidine	Ferguson R B, Ball N A, Cerny P (1991) Structure refinement of an adularian end-member high sanidine from the Buck Claim Pegmatite, Bernic Lake, Manitoba The Canadian Mineralogist 29 543-552	1991	Buck Claim Pegmatite, Bernic Lake, Manitoba, Canada	0	293
0005272	Sanidine	Ferguson R B, Ball N A, Cerny P (1991) Structure refinement of an adularian end-member high sanidine from the Buck Claim Pegmatite, Bernic Lake, Manitoba The Canadian Mineralogist 29 543-552	1991	Buck Claim Pegmatite, Bernic Lake, Manitoba, Canada	0	293
0005271	Sanidine	Ferguson R B, Ball N A, Cerny P (1991) Structure refinement of an adularian end-member high sanidine from the Buck Claim Pegmatite, Bernic Lake, Manitoba The Canadian Mineralogist 29 543-552	1991	Buck Claim Pegmatite, Bernic Lake, Manitoba, Canada	0	293
0005270	Sanidine	Ferguson R B, Ball N A, Cerny P (1991) Structure refinement of an adularian end-member high sanidine from the Buck Claim Pegmatite, Bernic Lake, Manitoba The Canadian Mineralogist 29 543-552	1991	Buck Claim Pegmatite, Bernic Lake, Manitoba, Canada	0	293
0020567	Sanidine	Deubener J, Sternitzke M, Mueller G (1991) Feldspars MAlSi3O8 (M=H,Li,Ag) synthesized by low-temperature ion exchange American Mineralogist 76 1620-1627	1991	Volkesfeld, Eifel, Germany	0	293
0001289	Anorthite	Angel R J, Carpenter M A, Finger L W (1990) Structural variation associated with compositional variation and order-disorder behavior in anorthite-rich feldspars sample #115082a American Mineralogist 75 150-162	1990	South of Blantyre, Nyasalad (Malawi)	0	293
0001288	Anorthite	Angel R J, Carpenter M A, Finger L W (1990) Structural variation associated with compositional variation and order-disorder behavior in anorthite-rich feldspars American Mineralogist 75 150-162	1990	Monte Somma, Italy	0	293
0001287	Anorthite	Angel R J, Carpenter M A, Finger L W (1990) Structural variation associated with compositional variation and order-disorder behavior in anorthite-rich feldspars American Mineralogist 75 150-162	1990	Monte Somma, Italy	0	293
0001286	Anorthite	Angel R J, Carpenter M A, Finger L W (1990) Structural variation associated with compositional variation and order-disorder behavior in anorthite-rich feldspars American Mineralogist 75 150-162	1990	Val Pasmeda, Austria	0	293
0001285	Albite	Armbruster T, Burgi H B, Kunz M, Gnos E, Bronnimann S, Lienert C (1990) Variation of displacement parameters in structure refinements of low albite American Mineralogist 75 135-140	1990	Roc Tourne, France	0	293
0001194	Anorthite	Angel R J (1988) High-pressure structure of anorthite American Mineralogist 73 1114-1119	1988	Val Pasmeda, Austria	0	293
0019661	Albite	FitzGerald J D, Parise J B, Mackinnon I D R (1986) Average structure of an An48 plagioclase from the Hogarth Ranges American Mineralogist 71 1399-1408	1986	Hogarth Ranges, northern New South Wales, Australia	0	293
0019660	Albite	FitzGerald J D, Parise J B, Mackinnon I D R (1986) Average structure of an An48 plagioclase from the Hogarth Ranges American Mineralogist 71 1399-1408	1986	Hogarth Ranges, northern New South Wales, Australia	0	293
0020572	Sanidine	Gering E (1985) Silizium/Aluminium-Ordnung und Kristallperfektion von Sanidinen Dissertation Kernforshungszentrum Karlsruhe 1 1-97	1985	Madagascar	0	293
0020571	Sanidine	Gering E (1985) Silizium/Aluminium-Ordnung und Kristallperfektion von Sanidinen Dissertation Kernforshungszentrum Karlsruhe 1 1-97	1985	Madagascar	0	293
0020570	Sanidine	Gering E (1985) Silizium/Aluminium-Ordnung und Kristallperfektion von Sanidinen Dissertation Kernforshungszentrum Karlsruhe 1 1-97	1985	Madagascar	0	293
0000998	Paracelsian	Chiari G, Gazzoni G, Craig J R, Gibbs G V, Louisnathan S J (1985) Two independent refinements of the structure of paracelsian, BaAl2Si2O8 American Mineralogist 70 969-974	1985	Benallt Mine, Carnarvonshire, U.K.	0	293
0000997	Paracelsian	Chiari G, Gazzoni G, Craig J R, Gibbs G V, Louisnathan S J (1985) Two independent refinements of the structure of paracelsian, BaAl2Si2O8 American Mineralogist 70 969-974	1985	Benallt Mine, Carnarvonshire, U.K.	0	293
0020546	Orthoclase	Gering E (1985) Silizium/Aluminium-Ordnung und Kristallperfektion von Sanidinen Dissertation Kernforshungszentrum Karlsruhe 1 1-97	1985	Madagascar	0	293
0020641	Anorthite	Chiari G, Benna P, Bruno E (1984) The structure of bytownite (An85). A new refinement Zeitschrift fur Kristallographie 169 35-49	1984	Traversella stock, Sesia Lanzo zone, Western Alps, Italy	0	293
0020640	Anorthite	Chiari G, Benna P, Bruno E (1984) The structure of bytownite (An85). A new refinement Zeitschrift fur Kristallographie 169 35-49	1984	Traversella stock, Sesia Lanzo zone, Western Alps, Italy	0	293
0019651	Orthoclase	Viswanathan K, Kielhorn H M (1983) Al,Si distribution in a ternary (Ba,K,Na)-feldspar as determined by crystal structure refinement American Mineralogist 68 122-124	1983	Yugoslavia	0	293
0000887	Hyalophane	Viswanathan K, Kielhorn H M (1983) Al,Si distribution in a ternary (Ba,K,Na)-feldspar as determined by crystal structure refinement Celsian-rich American Mineralogist 68 122-124	1983	Yugoslavia	0	293
0019656	Albite	Harlow G E (1982) The anorthoclase structures: The effects of temperature and composition American Mineralogist 67 975-996	1982	Kakanui, New Zealand	0	293
0019654	Albite	Harlow G E (1982) The anorthoclase structures: The effects of temperature and composition American Mineralogist 67 975-996	1982	Mt Gibele, Pantelleria Islands, Italy	0	293
0019652	Albite	Harlow G E (1982) The anorthoclase structures: The effects of temperature and composition American Mineralogist 67 975-996	1982	Grande Calderira, Azores	0	293
0000781	Sanidine	Viswanathan K, Brandt K (1980) The crystal structure of ternary (Ba,K,Na)-feldspar and its significance American Mineralogist 65 472-476	1980	Otjosondu, Namibia	0	293
0019667	Anorthite	Wenk H R, Joswig W, Tagai T, Korekawa M, Smith B K (1980) The average structure of An 62-66 labradorite American Mineralogist 65 81-95	1980	Sissone, Bergell Alps, Switzerland	0	293
0019666	Anorthite	Wenk H R, Joswig W, Tagai T, Korekawa M, Smith B K (1980) The average structure of An 62-66 labradorite American Mineralogist 65 81-95	1980	Gordemo, Verzasca Valley, Switzerland	0	293
0019665	Anorthite	Wenk H R, Joswig W, Tagai T, Korekawa M, Smith B K (1980) The average structure of An 62-66 labradorite American Mineralogist 65 81-95	1980	Lake County, Oregon, USA	0	293
0019664	Anorthite	Wenk H R, Joswig W, Tagai T, Korekawa M, Smith B K (1980) The average structure of An 62-66 labradorite American Mineralogist 65 81-95	1980	Lake County, Oregon, USA	0	293
0019663	Anorthite	Wenk H R, Joswig W, Tagai T, Korekawa M, Smith B K (1980) The average structure of An 62-66 labradorite American Mineralogist 65 81-95	1980	Surtsey, Iceland	0	293
0019662	Anorthite	Wenk H R, Joswig W, Tagai T, Korekawa M, Smith B K (1980) The average structure of An 62-66 labradorite American Mineralogist 65 81-95	1980	Surtsey, Iceland	0	293
0000714	Microcline	Ribbe P H (1979) The structure of a strained intermediate microcline in cryptoperthitic association with twinned plagioclase feldspar American Mineralogist 64 402-408	1979	Kongnat syenite, SW Greenland	0	293
0019669	Anorthite	Facchinelli A, Bruno E, Chiari G (1979) The structure of bytownite quenched from 1723 K Acta Crystallographica B35 34-42	1979	satellite dyke, Traversella stock, Sesia Lanzo zone, Western Alps, Italy	0	293
0019668	Anorthite	Facchinelli A, Bruno E, Chiari G (1979) The structure of bytownite quenched from 1723 K Acta Crystallographica B35 34-42	1979	satellite dyke, Traversella stock, Sesia Lanzo zone, Western Alps, Italy	0	293
0020552	Orthoclase	Dal Negro A, De Pieri R, Quareni S (1978) The crystal structures of nine K feldspars from the Adamello Massif (Northern Italy) Acta Crystallographica B34 2699-2707	1978	Adamello Massif, Northern Italy	0	293
0020551	Orthoclase	Dal Negro A, De Pieri R, Quareni S (1978) The crystal structures of nine K feldspars from the Adamello Massif (Northern Italy) Acta Crystallographica B34 2699-2707	1978	Adamello Massif, Northern Italy	0	293
0020550	Orthoclase	Dal Negro A, De Pieri R, Quareni S (1978) The crystal structures of nine K feldspars from the Adamello Massif (Northern Italy) Acta Crystallographica B34 2699-2707	1978	Adamello Massif, Northern Italy	0	293
0020539	Microcline	Dal Negro A, De Pieri R, Quareni S (1978) The crystal structures of nine K feldspars from the Adamello Massif (Northern Italy) Acta Crystallographica B34 2699-2707	1978	Adamello Massif, Northern Italy	0	293
0020538	Microcline	Dal Negro A, De Pieri R, Quareni S (1978) The crystal structures of nine K feldspars from the Adamello Massif (Northern Italy) Acta Crystallographica B34 2699-2707	1978	Adamello Massif, Northern Italy	0	293
0020537	Microcline	Dal Negro A, De Pieri R, Quareni S (1978) The crystal structures of nine K feldspars from the Adamello Massif (Northern Italy) Acta Crystallographica B34 2699-2707	1978	Adamello Massif, Northern Italy	0	293
0020536	Microcline	Dal Negro A, De Pieri R, Quareni S (1978) The crystal structures of nine K feldspars from the Adamello Massif (Northern Italy) Acta Crystallographica B34 2699-2707	1978	Adamello Massif, Northern Italy	0	293
0020535	Microcline	Dal Negro A, De Pieri R, Quareni S (1978) The crystal structures of nine K feldspars from the Adamello Massif (Northern Italy) Acta Crystallographica B34 2699-2707	1978	Adamello Massif, Northern Italy	0	293
0020534	Microcline	Dal Negro A, De Pieri R, Quareni S (1978) The crystal structures of nine K feldspars from the Adamello Massif (Northern Italy) Acta Crystallographica B34 2699-2707	1978	Adamello Massif, Northern Italy	0	293
0020553	Orthoclase	Fenn P M, Brown G E (1977) Crystal structure of a synthetic, compositionally intermediate, hypersolvus alkali feldspar: evidence for Na, K site ordering Zeitschrift fur Kristallographie 145 124-145	1977	Synthetic	0	293
0020556	Sanidine	Brown G E, Hamilton W C, Prewitt C T, Sueno S (1974) Neutron diffraction study of Al/Si ordering in sanidine: a comparison with X-ray diffraction data The Feldspars: Proceedings of a NATO Advanced Study Institute 68-80	1974	Laacher See, Eifel District, Germany	0	293
0019486	Svyatoslavite	Takeuchi Y, Haga N, Ito J (1973) The crystal structure of monoclinic CaAl2Si2O8: a case of monoclinic structure closely simulating orthorhombic symmetry Zeitschrift fur Kristallographie 137 380-398	1973	synthetic	0	293
0000312	Sanidine	Phillips M W, Ribbe P H (1973) The structures of monoclinic potassium-rich feldspars American Mineralogist 58 263-270	1973	Laacher See, Eifel District, Germany	0	293
0000320	Orthoclase	Prince E, Donnay G, Martin R F (1973) Neutron diffraction refinement of an ordered orthoclase structure American Mineralogist 58 500-507	1973	Himalaya mine, California, USA	0	293
0000313	Orthoclase	Phillips M W, Ribbe P H (1973) The structures of monoclinic potassium-rich feldspars American Mineralogist 58 263-270	1973	St. Gotthard, Switzerland	0	293
0010741	Sanidine	Weitz G (1972) Die struktur des saninins bei verschiedenen ordnungsgraden Zeitschrift fur Kristallographie 136 418-426	1972	Volkesfeld, Eifel	0	293
0010740	Sanidine	Weitz G (1972) Die struktur des saninins bei verschiedenen ordnungsgraden Zeitschrift fur Kristallographie 136 418-426	1972	Volkesfeld, Eifel	0	293
0019659	Albite	Phillips M W, Colville A A, Ribbe P H (1971) The crystal structures of two oligoclases: a comparison with low and high albite Zeitschrift fur Kristallographie 133 43-65	1971	Camedo, Switzerland	0	293
0019658	Albite	Phillips M W, Colville A A, Ribbe P H (1971) The crystal structures of two oligoclases: a comparison with low and high albite Zeitschrift fur Kristallographie 133 43-65	1971	Camedo, Switzerland	0	293
0000167	Orthoclase	Colville A A, Ribbe P H (1968) The crystal structure of an adularia and a refinement of the structure of orthoclase American Mineralogist 53 25-37	1968	St. Gotthard, Switzerland, known as Spencer C	0	293
0000166	Orthoclase	Colville A A, Ribbe P H (1968) The crystal structure of an adularia and a refinement of the structure of orthoclase American Mineralogist 53 25-37	1968	St. Gotthard, Switzerland, known as Spencer B, variety adularia	0	293
0020562	Sanidine	Onorato E, Penta M, Sgarlata F (1963) Struttura del Sanidino Periodico di Mineralogia 32 1-34	1963	Alban Hills, Rome Province, Latium, Italy	0	293
0020563	Sanidine	Ribbe P H (1963) A refinement of the crystal structure of sanidinised orthoclase Acta Crystallographica 16 426-427	1963	Unknown	0	293
0020547	Orthoclase	Jones J B, Taylor W H (1961) The structure of orthoclase Acta Crystallographica 14 443-456	1961	Mogok, Upper Burma	0	293
0009156	Paracelsian	Smith J V (1953) The crystal structure of paracelsian, BaAl2Si2O8 Acta Crystallographica 6 613-620	1953	Benallt Mine, near Rhiw, Carnarvonshire, U.K.	0	293
0002653	Slawsonite	Benna P, Bruno E (2001) Single-crystal in situ high-temperature structural investigation on strontium feldspar American Mineralogist 86 690-696	2001	synthetic	0	433
0020560	Sanidine	Kimata M, Saito S, Shimizu M, Iida I, Matsui T (1996) Low-temperature structures of orthoclase and sanidine Neues Jahrbuch fur Mineralogie, Abhandlungen 171 199-213	1996	Volkesfeld, Eifel, Germany	0	121
0020548	Orthoclase	Kimata M, Saito S, Shimizu M, Iida I, Matsui T (1996) Low-temperature structures of orthoclase and sanidine Neues Jahrbuch fur Mineralogie, Abhandlungen 171 199-213	1996	Itrongay, Madagascar	0	121
0001015	Albite	Smith J V, Artioli G (1986) Low albite, NaAlSi3O8: Neutron diffraction study of crystal structure at 13 K American Mineralogist 71 727-733	1986	Amelia, Virginia, USA	0	13
0020543	Orthoclase	Angel R J, Ross N L, Zhao J, Sochalski-Kolbus L, Kruger H, Schmidt B C (2013) Structural controls on the anisotropy of tetrahedral frameworks: the example of monoclinic feldspars European Journal of Mineralogy 25 597-614	2013	Unknown	0	600
0002654	Slawsonite	Benna P, Bruno E (2001) Single-crystal in situ high-temperature structural investigation on strontium feldspar American Mineralogist 86 690-696	2001	synthetic	0	603
0020104	Anorthite	Wadoski-Romeijn E, Armbruster T (2013) Topotactic transformation and dehydration of the zeolite gismondine to a novel Ca feldspar structure American Mineralogist 98 1988-1997	2013	Rio Pian del Foco, Genova province, Italy	0	623
0000537	Albite	Prewitt C T, Sueno S, Papike J J (1976) The crystal structures of high albite and monalbite at high temperatures feldspar American Mineralogist 61 1213-1225	1976	synthetic	0	623
0019653	Albite	Harlow G E (1982) The anorthoclase structures: The effects of temperature and composition American Mineralogist 67 975-996	1982	Grande Calderira, Azores	0	673
0020565	Sanidine	Ohashi Y, Finger LW (1974) Refinement of the crystal structure of sanidine at 25 and 400C Carnegie Institution of Washington: Yearbook 73 539-544	1974	Laacher See, Eifel District, Germany	0	673
0000716	Albite	Winter J K, Okamura F P, Ghose S (1979) A high-temperature structural study of high albite, monalbite, and the analbite - monalbite phase transition American Mineralogist 64 409-423	1979	Tiburon, Marin County, California, USA	0	773
0002655	Slawsonite	Benna P, Bruno E (2001) Single-crystal in situ high-temperature structural investigation on strontium feldspar American Mineralogist 86 690-696	2001	synthetic	0	783
0019655	Albite	Harlow G E (1982) The anorthoclase structures: The effects of temperature and composition American Mineralogist 67 975-996	1982	Mt Gibele, Pantelleria Islands, Italy	0	783
0000538	Albite	Prewitt C T, Sueno S, Papike J J (1976) The crystal structures of high albite and monalbite at high temperatures feldspar American Mineralogist 61 1213-1225	1976	synthetic	0	873
0020544	Orthoclase	Angel R J, Ross N L, Zhao J, Sochalski-Kolbus L, Kruger H, Schmidt B C (2013) Structural controls on the anisotropy of tetrahedral frameworks: the example of monoclinic feldspars European Journal of Mineralogy 25 597-614	2013	Unknown	0	900
0020573	Sanidine	Gering E (1985) Silizium/Aluminium-Ordnung und Kristallperfektion von Sanidinen Dissertation Kernforshungszentrum Karlsruhe 1 1-97	1985	Madagascar	0	923
0002656	Slawsonite	Benna P, Bruno E (2001) Single-crystal in situ high-temperature structural investigation on strontium feldspar American Mineralogist 86 690-696	2001	synthetic	0	943
0020574	Sanidine	Gering E (1985) Silizium/Aluminium-Ordnung und Kristallperfektion von Sanidinen Dissertation Kernforshungszentrum Karlsruhe 1 1-97	1985	Madagascar	0	1023
0019657	Albite	Harlow G E (1982) The anorthoclase structures: The effects of temperature and composition American Mineralogist 67 975-996	1982	Kakanui, New Zealand	0	1023
0000717	Albite	Winter J K, Okamura F P, Ghose S (1979) A high-temperature structural study of high albite, monalbite, and the analbite - monalbite phase transition American Mineralogist 64 409-423	1979	Tiburon, Marin County, California, USA	0	1023
0000539	Albite	Prewitt C T, Sueno S, Papike J J (1976) The crystal structures of high albite and monalbite at high temperatures feldspar American Mineralogist 61 1213-1225	1976	synthetic	0	1023
0020566	Sanidine	Ohashi Y, Finger LW (1975) An effect of temperature on the feldspar structure: crystal structure of sanidine at 800C Carnegie Institution of Washington: Yearbook 74 569-572	1975	Laacher See, Eifel District, Germany	0	1073
0020545	Orthoclase	Angel R J, Ross N L, Zhao J, Sochalski-Kolbus L, Kruger H, Schmidt B C (2013) Structural controls on the anisotropy of tetrahedral frameworks: the example of monoclinic feldspars European Journal of Mineralogy 25 597-614	2013	Unknown	0	1075
0020576	Sanidine	Gering E (1985) Silizium/Aluminium-Ordnung und Kristallperfektion von Sanidinen Dissertation Kernforshungszentrum Karlsruhe 1 1-97	1985	Madagascar	0	1123
0020575	Sanidine	Gering E (1985) Silizium/Aluminium-Ordnung und Kristallperfektion von Sanidinen Dissertation Kernforshungszentrum Karlsruhe 1 1-97	1985	Madagascar	0	1123
0020579	Sanidine	Gering E (1985) Silizium/Aluminium-Ordnung und Kristallperfektion von Sanidinen Dissertation Kernforshungszentrum Karlsruhe 1 1-97	1985	Madagascar	0	1223
0020578	Sanidine	Gering E (1985) Silizium/Aluminium-Ordnung und Kristallperfektion von Sanidinen Dissertation Kernforshungszentrum Karlsruhe 1 1-97	1985	Madagascar	0	1223
0000540	Albite	Prewitt C T, Sueno S, Papike J J (1976) The crystal structures of high albite and monalbite at high temperatures feldspar American Mineralogist 61 1213-1225	1976	synthetic	0	1223
0000720	Albite	Winter J K, Okamura F P, Ghose S (1979) A high-temperature structural study of high albite, monalbite, and the analbite - monalbite phase transition American Mineralogist 64 409-423	1979	Tiburon, Marin County, California, USA	0	1253
0000718	Albite	Winter J K, Okamura F P, Ghose S (1979) A high-temperature structural study of high albite, monalbite, and the analbite - monalbite phase transition American Mineralogist 64 409-423	1979	Tiburon, Marin County, California, USA	0	1253
0000719	Albite	Winter J K, Okamura F P, Ghose S (1979) A high-temperature structural study of high albite, monalbite, and the analbite - monalbite phase transition American Mineralogist 64 409-423	1979	Tiburon, Marin County, California, USA	0	1313
0020581	Sanidine	Gering E (1985) Silizium/Aluminium-Ordnung und Kristallperfektion von Sanidinen Dissertation Kernforshungszentrum Karlsruhe 1 1-97	1985	Madagascar	0	1323
0020580	Sanidine	Gering E (1985) Silizium/Aluminium-Ordnung und Kristallperfektion von Sanidinen Dissertation Kernforshungszentrum Karlsruhe 1 1-97	1985	Madagascar	0	1323
0020577	Sanidine	Gering E (1985) Silizium/Aluminium-Ordnung und Kristallperfektion von Sanidinen Dissertation Kernforshungszentrum Karlsruhe 1 1-97	1985	Madagascar	0	1323
0000721	Albite	Winter J K, Okamura F P, Ghose S (1979) A high-temperature structural study of high albite, monalbite, and the analbite - monalbite phase transition American Mineralogist 64 409-423	1979	Tiburon, Marin County, California, USA	0	1333
0000541	Albite	Prewitt C T, Sueno S, Papike J J (1976) The crystal structures of high albite and monalbite at high temperatures feldspar American Mineralogist 61 1213-1225	1976	synthetic	0	1363
0000542	Albite	Prewitt C T, Sueno S, Papike J J (1976) The crystal structures of high albite and monalbite at high temperatures feldspar American Mineralogist 61 1213-1225	1976	synthetic	0	1378
0001195	Anorthite	Angel R J (1988) High-pressure structure of anorthite American Mineralogist 73 1114-1119	1988	Val Pasmeda, Austria	2.5	293
0001196	Anorthite	Angel R J (1988) High-pressure structure of anorthite American Mineralogist 73 1114-1119	1988	Val Pasmeda, Austria	3.1	293
0004408	Slawsonite	Benna P, Nestola F, Ballaran T B, Balic-Zunic T, Lundegaard L F, Bruno E (2007) The high-pressure structural configurations of Ca0.2Sr0.8Al2Si2O8 feldspar: The I-1-I2/c and I2/c-P2_1/c phase transitions American Mineralogist 92 1190-1199	2007	synthetic	3.2	293
0004409	Slawsonite	Benna P, Nestola F, Ballaran T B, Balic-Zunic T, Lundegaard L F, Bruno E (2007) The high-pressure structural configurations of Ca0.2Sr0.8Al2Si2O8 feldspar: The I-1-I2/c and I2/c-P2_1/c phase transitions American Mineralogist 92 1190-1199	2007	synthetic	4.4	293
0004410	Slawsonite	Benna P, Nestola F, Ballaran T B, Balic-Zunic T, Lundegaard L F, Bruno E (2007) The high-pressure structural configurations of Ca0.2Sr0.8Al2Si2O8 feldspar: The I-1-I2/c and I2/c-P2_1/c phase transitions American Mineralogist 92 1190-1199	2007	synthetic	6.2	293
0004411	Slawsonite	Benna P, Nestola F, Ballaran T B, Balic-Zunic T, Lundegaard L F, Bruno E (2007) The high-pressure structural configurations of Ca0.2Sr0.8Al2Si2O8 feldspar: The I-1-I2/c and I2/c-P2_1/c phase transitions American Mineralogist 92 1190-1199	2007	synthetic	7.4	293
0007076	Filatovite	Filatov S K, Krivovichev S V, Burns P C, Vergasova L P (2004) Crystal structure of filatovite, K[(Al,Zn)2(As,Si)2O8], the first arsenate of the feldspar group European Journal of Mineralogy 16 537-543	2004		0	293
0008921	Buddingtonite	Mookherjee M, Redfern S A T, Swainson I, Harlov D E (2004) Low-temperature behaviour of ammonium ion in buddingtonite [N(D/H)4AlSi3O8] from neutron powder diffraction Physics and Chemistry of Minerals 31 643-649	2004		0	293
0008920	Buddingtonite	Mookherjee M, Redfern S A T, Swainson I, Harlov D E (2004) Low-temperature behaviour of ammonium ion in buddingtonite [N(D/H)4AlSi3O8] from neutron powder diffraction Physics and Chemistry of Minerals 31 643-649	2004		0	293
0008919	Buddingtonite	Mookherjee M, Redfern S A T, Swainson I, Harlov D E (2004) Low-temperature behaviour of ammonium ion in buddingtonite [N(D/H)4AlSi3O8] from neutron powder diffraction Physics and Chemistry of Minerals 31 643-649	2004		0	293
0013253	Hexacelsian	Kremenovic A, Colomban P, Piriou B, Massiot D, Florian P (2003) Structural and spectroscopic characterization of the quenched hexacelsian Journal of Physics and Chemistry of Solids 64 2253-2268	2003		0	293
0002215	Reedmergnerite	Downs R T, Yang H, Hazen R M, Finger L W, Prewitt C T (1999) Compressibility mechanisms of alkali feldspars: New data from reedmergnerite Sample from Joseph Smith #1 mine, Duchesne Co., Utah, NMNH 140 American Mineralogist 84 333-340	1999		0	293
0002214	Reedmergnerite	Downs R T, Yang H, Hazen R M, Finger L W, Prewitt C T (1999) Compressibility mechanisms of alkali feldspars: New data from reedmergnerite Sample from Joseph Smith #1 mine, Duchesne Co., Utah, NMNH 140 American Mineralogist 84 333-340	1999		0	293
0006649	Microcline	Allan D R, Angel R J (1997) A high-pressure structural study of microcline (KAlSi3O8) to 7 GPa European Journal of Mineralogy 9 263-275	1997		0	293
0006694	Anorthite	Matsui T, Kimata M (1997) Crystal chemistry of synthetic Mn-bearing anorthite: Incorporation of MnAl2Si2O8 end-member into feldspar European Journal of Mineralogy 9 333-344	1997		0	293
0006611	Sanidine	Kimata M, Shimizu M, Saito S (1996) High-temperature crystal structure of sanidine Part II. The crystal structure of sanidine at 935 C European Journal of Mineralogy 8 15-24	1996		0	293
0006610	Sanidine	Kimata M, Shimizu M, Saito S (1996) High-temperature crystal structure of sanidine Part II. The crystal structure of sanidine at 935 C European Journal of Mineralogy 8 15-24	1996		0	293
0006587	Sanidine	Kimata M, Saito S, Shimizu M (1995) Structure of sanidine-type KGaSi3O8: Tetrahedral-site disordering in potassium feldspar European Journal of Mineralogy 7 287-293	1995		0	293
0007930	Orthoclase	Tseng H-Y, Heaney P J, Onstott T C (1995) Characterization of lattice strain induced by neutron irradiation Physics and Chemistry of Minerals 22 399-405	1995		0	293
0007929	Orthoclase	Tseng H-Y, Heaney P J, Onstott T C (1995) Characterization of lattice strain induced by neutron irradiation Physics and Chemistry of Minerals 22 399-405	1995		0	293
0007928	Orthoclase	Tseng H-Y, Heaney P J, Onstott T C (1995) Characterization of lattice strain induced by neutron irradiation Physics and Chemistry of Minerals 22 399-405	1995		0	293
0001683	Albite	Downs R T, Hazen R M, Finger L W (1994) The high-pressure crystal chemistry of low albite and the origin of the pressure dependency of Al-Si ordering American Mineralogist 79 1042-1052	1994		0	293
0001682	Albite	Downs R T, Hazen R M, Finger L W (1994) The high-pressure crystal chemistry of low albite and the origin of the pressure dependency of Al-Si ordering American Mineralogist 79 1042-1052	1994		0	293
0001441	Reedmergnerite	Fleet M E (1992) Tetrahedral-site occupancies in reedmergnerite and synthetic boron albite (NaBSi3O8) sample high boron albite Gb87, known as reedmergnerite-high American Mineralogist 77 76-84	1992		0	293
0001440	Reedmergnerite	Fleet M E (1992) Tetrahedral-site occupancies in reedmergnerite and synthetic boron albite (NaBSi3O8) sample low boron albite Gb100 American Mineralogist 77 76-84	1992		0	293
0001439	Reedmergnerite	Fleet M E (1992) Tetrahedral-site occupancies in reedmergnerite and synthetic boron albite (NaBSi3O8) sample from Utah American Mineralogist 77 76-84	1992		0	293
0006421	Sanidine	Kroll H, Flogel J, Breit U, Lons J, Pentinghaus H (1991) Order and anti-order in Ge-substituted alkali feldspars European Journal of Mineralogy 3 739-749	1991		0	293
0006424	Albite	Kroll H, Flogel J, Breit U, Lons J, Pentinghaus H (1991) Order and anti-order in Ge-substituted alkali feldspars European Journal of Mineralogy 3 739-749	1991		0	293
0006423	Albite	Kroll H, Flogel J, Breit U, Lons J, Pentinghaus H (1991) Order and anti-order in Ge-substituted alkali feldspars European Journal of Mineralogy 3 739-749	1991		0	293
0006422	Albite	Kroll H, Flogel J, Breit U, Lons J, Pentinghaus H (1991) Order and anti-order in Ge-substituted alkali feldspars European Journal of Mineralogy 3 739-749	1991		0	293
0001125	Sanidine	Scambos T A, Smyth J R, McCormick T C (1987) Crystal-structure refinement of high sanidine from the upper mantle American Mineralogist 72 973-978	1987		0	293
0000800	Albite	Harlow G E, Brown G E (1980) Low albite: An X-Ray and neutron diffraction study American Mineralogist 65 986-995	1980		0	293
0000799	Albite	Harlow G E, Brown G E (1980) Low albite: An X-Ray and neutron diffraction study American Mineralogist 65 986-995	1980		0	293
0000798	Albite	Harlow G E, Brown G E (1980) Low albite: An X-Ray and neutron diffraction study American Mineralogist 65 986-995	1980		0	293
0000797	Albite	Harlow G E, Brown G E (1980) Low albite: An X-Ray and neutron diffraction study American Mineralogist 65 986-995	1980		0	293
0000695	Sanidine	Keefer K D, Brown G E (1978) Crystal structure and composition of sanidine and high albite in cryptoperthitic intergrowth Note this sample of feldspar is from the Rabb Canyon pegmatite, Grant County, New Mexico, USA American Mineralogist 63 1264-1273	1978		0	293
0000694	Albite	Keefer K D, Brown G E (1978) Crystal structures and compositions of sanidine and high albite in cryptoperthitic intergrowth Note this sample of feldspar is from the Rabb Canyon pegmatite, Grant County, New Mexico, USA American Mineralogist 63 1264-1273	1978		0	293
0000553	Slawsonite	Griffen D T, Ribbe P H, Gibbs G V (1977) The structure of slawsonite, a strontium analog of paracelsian American Mineralogist 62 31-35	1977		0	293
0009609	Hyalophane	De Pieri R, Quareni S, Hall K M (1977) Refinement of the structures of low and high hyalophanes Acta Crystallographica B33 3073-3076	1977		0	293
0009608	Hyalophane	De Pieri R, Quareni S, Hall K M (1977) Refinement of the structures of low and high hyalophanes Acta Crystallographica B33 3073-3076	1977		0	293
0000519	Celsian	Griffen D T, Ribbe P H (1976) Refinement of the crystal structure of celsian American Mineralogist 61 414-418	1976		0	293
0016634	Anorthite	Klein S, Korekawa M (1976) Die gemittelte Struktur des Labradorits _cod_database_code 1008757 Neues Jahrbuch fur Mineralogie, Monatshefte 1976 66-69	1976		0	293
0009393	Rubicline	Gasperin M (1971) Structure cristalline de RbAlSi3O8 _cod_database_code 1001771 Acta Crystallographica B27 854-855	1971		0	293
0010723	Anorthite	Wainwright J, Starkey J (1971) A refinement of the structure of anorthite _cod_database_code 1000034 Zeitschrift fur Kristallographie 133 75-84	1971		0	293
0000139	Reedmergnerite	Appleman D E, Clark J R (1965) Crystal structure of reedmergnerite, a boron albite, and its relation to feldspar crystal chemistry American Mineralogist 50 1827-1850	1965		0	293
0018075	Orthoclase	Chao S, Hargreaves A, Taylor W (1940) The structure of orthoclase. _cod_database_code 1011205 Mineralogical Magazine 25 498-512	1940		0	293
0018062	Sanidine	Taylor W (1934) The structure of sanidine and other felspars _cod_database_code 1011187 Zeitschrift fur Kristallographie 87 464-481	1934		0	293
0018087	Sanidine	Taylor W (1933) The structure of sanidine and other feldspars 2.56 _cod_database_code 1011224 Zeitschrift fur Kristallographie 85 425-442	1933		0	293
0000370	Anorthite	Foit F F, Peacor D R (1973) The anorthite crystal structure at 410 and 830 C American Mineralogist 58 665-675	1973		0	683
0000595	Albite	Winter J K, Ghose S, Okamura F P (1977) A high-temperature study of the thermal expansion and the anisotropy of the sodium atom in low albite American Mineralogist 62 921-931	1977		0	773
0000596	Albite	Winter J K, Ghose S, Okamura F P (1977) A high-temperature study of the thermal expansion and the anisotropy of the sodium atom in low albite American Mineralogist 62 921-931	1977		0	1023
0000371	Anorthite	Foit F F, Peacor D R (1973) The anorthite crystal structure at 410 and 830 C American Mineralogist 58 665-675	1973		0	1103
0000597	Albite	Winter J K, Ghose S, Okamura F P (1977) A high-temperature study of the thermal expansion and the anisotropy of the sodium atom in low albite American Mineralogist 62 921-931	1977		0	1243
0001684	Albite	Downs R T, Hazen R M, Finger L W (1994) The high-pressure crystal chemistry of low albite and the origin of the pressure dependency of Al-Si ordering American Mineralogist 79 1042-1052	1994		0.44	293
0002216	Reedmergnerite	Downs R T, Yang H, Hazen R M, Finger L W, Prewitt C T (1999) Compressibility mechanisms of alkali feldspars: New data from reedmergnerite Sample from Joseph Smith #1 mine, Duchesne Co., Utah, NMNH 140 American Mineralogist 84 333-340	1999		0.88	293
0001685	Albite	Downs R T, Hazen R M, Finger L W (1994) The high-pressure crystal chemistry of low albite and the origin of the pressure dependency of Al-Si ordering American Mineralogist 79 1042-1052	1994		1.22	293
0006650	Microcline	Allan D R, Angel R J (1997) A high-pressure structural study of microcline (KAlSi3O8) to 7 GPa European Journal of Mineralogy 9 263-275	1997		1.4	293
0002217	Reedmergnerite	Downs R T, Yang H, Hazen R M, Finger L W, Prewitt C T (1999) Compressibility mechanisms of alkali feldspars: New data from reedmergnerite Sample from Joseph Smith #1 mine, Duchesne Co., Utah, NMNH 140 American Mineralogist 84 333-340	1999		1.89	293
0001686	Albite	Downs R T, Hazen R M, Finger L W (1994) The high-pressure crystal chemistry of low albite and the origin of the pressure dependency of Al-Si ordering American Mineralogist 79 1042-1052	1994		2.68	293
0006651	Microcline	Allan D R, Angel R J (1997) A high-pressure structural study of microcline (KAlSi3O8) to 7 GPa European Journal of Mineralogy 9 263-275	1997		2.9	293
0002218	Reedmergnerite	Downs R T, Yang H, Hazen R M, Finger L W, Prewitt C T (1999) Compressibility mechanisms of alkali feldspars: New data from reedmergnerite Sample from Joseph Smith #1 mine, Duchesne Co., Utah, NMNH 140 American Mineralogist 84 333-340	1999		3	293
0002219	Reedmergnerite	Downs R T, Yang H, Hazen R M, Finger L W, Prewitt C T (1999) Compressibility mechanisms of alkali feldspars: New data from reedmergnerite Sample from Joseph Smith #1 mine, Duchesne Co., Utah, NMNH 140 American Mineralogist 84 333-340	1999		3.64	293
0001687	Albite	Downs R T, Hazen R M, Finger L W (1994) The high-pressure crystal chemistry of low albite and the origin of the pressure dependency of Al-Si ordering American Mineralogist 79 1042-1052	1994		3.78	293
0006652	Microcline	Allan D R, Angel R J (1997) A high-pressure structural study of microcline (KAlSi3O8) to 7 GPa European Journal of Mineralogy 9 263-275	1997		4.4	293
0002220	Reedmergnerite	Downs R T, Yang H, Hazen R M, Finger L W, Prewitt C T (1999) Compressibility mechanisms of alkali feldspars: New data from reedmergnerite Sample from Joseph Smith #1 mine, Duchesne Co., Utah, NMNH 140 American Mineralogist 84 333-340	1999		4.68	293
0006653	Microcline	Allan D R, Angel R J (1997) A high-pressure structural study of microcline (KAlSi3O8) to 7 GPa European Journal of Mineralogy 9 263-275	1997		6.2	293
0003798	Albite	Benusa M D, Angel R J, Ross N L (2005) Compression of albite, NaAlSi3O8 American Mineralogist 90 1115-1120	2005		6.489	293
0006654	Microcline	Allan D R, Angel R J (1997) A high-pressure structural study of microcline (KAlSi3O8) to 7 GPa European Journal of Mineralogy 9 263-275	1997		7.1	293
0003799	Albite	Benusa M D, Angel R J, Ross N L (2005) Compression of albite, NaAlSi3O8 American Mineralogist 90 1115-1120	2005		8.411	293
0003800	Albite	Benusa M D, Angel R J, Ross N L (2005) Compression of albite, NaAlSi3O8 American Mineralogist 90 1115-1120	2005		9.431	293

CIF Raw Data - click here to close

data_global
_chemical_name_mineral 'Microcline'
loop_
_publ_author_name
'Blasi A'
'De Pol Blasi C'
'Zanazzi P F'
_journal_name_full 'The Canadian Mineralogist'
_journal_volume 25 
_journal_year 1987
_journal_page_first 527
_journal_page_last 537
_publ_section_title
;
 A re-examination of the Pellotsalo microcline: Mineralogical implications and
 genetic considerations
;
_database_code_amcsd 0005216
_chemical_formula_sum '(K.95 Na.05) Al Si3 O8'
_cell_length_a 8.5714
_cell_length_b 12.9646
_cell_length_c 7.2217
_cell_angle_alpha 90.6
_cell_angle_beta 115.9
_cell_angle_gamma 87.7
_cell_volume 721.300
_exptl_crystal_density_diffrn      2.556
_symmetry_space_group_name_H-M 'C -1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2+y,z'
  '-x,-y,-z'
  '1/2-x,1/2-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
K   0.28260   0.99280   0.13670   0.95000
Na   0.28260   0.99280   0.13670   0.05000
Al   0.01000   0.18770   0.21700   1.00000
Si1   0.00980   0.81960   0.23230   1.00000
Si2   0.71110   0.12040   0.34010   1.00000
Si3   0.70570   0.88560   0.35050   1.00000
O1   0.00070   0.14480   0.98290   1.00000
O2   0.63650   0.00550   0.28570   1.00000
O3   0.82120   0.14770   0.21990   1.00000
O4   0.83190   0.85730   0.24010   1.00000
O5   0.03530   0.32000   0.25110   1.00000
O6   0.03810   0.69550   0.27020   1.00000
O7   0.19030   0.12290   0.40550   1.00000
O8   0.17540   0.87450   0.41180   1.00000
loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_12
_atom_site_aniso_U_13
_atom_site_aniso_U_23
K 0.01450 0.02280 0.02360 0.00050 0.00700 0.00000
Na 0.01450 0.02280 0.02360 0.00050 0.00700 0.00000
Al 0.00920 0.00770 0.00770 -0.00190 0.00400 0.00080
Si1 0.00920 0.00780 0.00660 0.00070 0.00450 0.00070
Si2 0.00840 0.00560 0.00830 -0.00110 0.00420 0.00080
Si3 0.00770 0.00660 0.00860 -0.00020 0.00400 0.00090
O1 0.01800 0.01340 0.00850 -0.00080 0.00700 0.00220
O2 0.01060 0.00580 0.01310 0.00060 0.00360 0.00080
O3 0.01390 0.01900 0.01870 -0.00480 0.01050 0.00020
O4 0.01470 0.02030 0.01790 0.00450 0.01100 0.00170
O5 0.01100 0.01050 0.01450 -0.00340 0.00510 0.00000
O6 0.01220 0.00980 0.01400 0.00180 0.00790 0.00230
O7 0.01620 0.01340 0.00930 0.00190 0.00320 0.00310
O8 0.01570 0.01570 0.00930 -0.00470 0.00150 0.00080

Synonyms of Feldspar GroupHide

Other Language Names for Feldspar GroupHide

Arabic:مجموعة الفلدسبار

Bosnian:Feldspat

Catalan:Feldspat

Czech:Živec

Danish:Feldspat

Dutch:Veldspaat

Esperanto:Feldspato

Estonian:Päevakivi

Farsi/Persian:فلدسپات

Finnish:Maasälpä

French:Feldspath

Galician:Feldespato

German:Feldspat
Feldspath
Feldstein
Feldtspat

Hebrew:פצלת השדה

Hungarian:Földpátok

Icelandic:Feldspat

Italian:Feldspato

Japanese:長石

Korean:장석

Latvian:Laukšpats

Lithuanian:Lauko špatas

Norwegian:Feltspat

Norwegian (Nynorsk):Feltspat

Polish:Skaleń

Portuguese:Feldspato

Romanian:Feldspat

Russian:Полевой шпат

Serbian:Фелдспат

Simplified Chinese:长石族
长石

Slovak:Skupina živca

Spanish:Feldespato

Swedish:Fältspat

Turkish:Feldspat

Varieties of Feldspar GroupHide

Antiperthite	An intergrowth of orthoclase (often as lamellae) enclosed in a plagioclase host. Result of an exsolution process (cf. also perthite).
Cryptoperthite	A variety of perthite with lamella of submicroscopic thickness.
Mesoperthite	A perthite with approximately equal amounts of alkali feldspar and plagioclase.
Perthite	An intergrowth of albite or oligoclase with a microcline host, occasionally also with an orthoclase host. The intergrowths or exsolution lamellae of the albite are visible as white lines coursing through the K feldspar groundmass. Common in granite pegma...
Sunstone	A variety of feldspar (variably microcline, orthoclase, albite or oligoclase, more rarely labradorite) that has schiller, commonly with an orange/brown background colour, due to exsolved oriented small hematite (or hematite and ilmenite) crystals that giv...

Relationship of Feldspar Group to other SpeciesHide

Feldspar Group Members:

Alkali Feldspar
K Feldspar
Microcline	K(AlSi₃O₈)	Tric. 1
Orthoclase	K(AlSi₃O₈)	Mon. 2/m : B2/m
Sanidine	K(AlSi₃O₈)	Mon. 2/m : B2/m
'Anorthoclase'	(Na,K)AlSi₃O₈	Tric.
Ferrisanidine	K[Fe³⁺Si₃O₈]	Mon. 2/m : B2/m
Rubicline	Rb(AlSi₃O₈)	Mon. 2/m : B2/m
Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Albite	Na(AlSi₃O₈)	Tric. 1
Anorthite	Ca(Al₂Si₂O₈)	Tric. 1 : P1
Buddingtonite	(NH₄)(AlSi₃O₈)	Mon. 2 : P2₁
Celsian	Ba(Al₂Si₂O₈)	Mon. 2/m
Filatovite	K(Al,Zn)₂(As,Si)₂O₈	Mon. 2/m
Hexacelsian	BaAl₂Si₂O₈	Hex. 6/mmm(6/m2/m2/m) : P6₃/mcm
Kokchetavite	K(AlSi₃O₈)	Hex. 6/mmm(6/m2/m2/m) : P6/mcc
Kumdykolite	Na(AlSi₃O₈)	Orth. mmm(2/m2/m2/m) : Pnnm
Paracelsian	Ba(Al₂Si₂O₈)	Mon. 2/m : P2₁/b
Reedmergnerite	NaBSi₃O₈	Tric. 1 : P1
Slawsonite	Sr(Al₂Si₂O₈)	Mon. 2/m : P2₁/b
Svyatoslavite	Ca(Al₂Si₂O₈)	Mon. 2 : P2₁
'Unnamed (New Ordered Member of the Alkali Feldspar Series)'	KNa(Si₆Al₂)O₁₆	Mon. m

Click on any node to view relationships. Formula-derived relationship network for the group members above. Use Find related species to add formula-neighbour species outside the current group view. Solid links show inferred chemical differences; dashed violet links show same-formula crystallographic differences. Hydration states are not treated as relationship changes. These relationships do not imply any real-world substitution reactions between these species.

Other InformationHide

Health Risks:

No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Feldspar Group in petrologyHide

An essential component of rock names highlighted in red, an accessory component in rock names highlighted in green.

Internet Links for Feldspar GroupHide

mindat.org URL:

https://www.mindat.org/min-1624.html
Please feel free to link to this page.

Search Engines:

Look for Feldspar Group on Google

Look for Feldspar Group images on Google

Look for Feldspar Group on Bing

Look for Feldspar Group images on Bing

Look for Feldspar Group on DuckDuckGo

Look for Feldspar Group images on DuckDuckGo

Look for Feldspar Group in the Rock H. Currier Digital Library

Mineral Dealers:

Buy from D. Joyce minerals

References for Feldspar GroupHide

Reference List:

Weiss, C.S. (1819) Krystallographische Fundamentalbestimmung des Feldspathes. Abhandlungen der physikalischen Klasse der Königlich-Preussischen Akademie der Wissenschaften aus den Jahren 1816-1817: 231-285.

MacKenzie, W. S.; Smith, J. V. (1955) The alkali feldspars: I. Orthoclase-microperthites. American Mineralogist, 40 (7-8). 707-732

Smith, J. V.; MacKenzie, W. S. (1955) The alkali feldspars: II. A simple X-ray technique for the study of alkali feldspars. American Mineralogist, 40 (7-8). 733-747

MacKenzie, W. S., Smith, J. V. (1956) The alkali feldspars. III. An optical and x-ray study of high temperature feldspars. American Mineralogist, 41 (5-6) 405-427

Smith, J. V., MacKenzie, W. S. (1958) Alkali feldspars: IV. The cooling history of high-temperature sodium-rich feldspars. American Mineralogist, 43 (9-10) 872-889

Laves, F. (1960) The feldspars, their polysynthetic twinning and their phase relations. Rend. Soc. Mineral. Ital.: 16: 37-100.

Ferguson, Robert Bury (1960) The low-temperature phases of the alkali feldspars and their origin. The Canadian Mineralogist, 6 (4). 415-436

Carmichael, I. S. E., MacKenzie, W. S. (1964) The lattice parameters of high-temperature triclinic sodic feldspars. Mineralogical Magazine and Journal of the Mineralogical Society, 33 (266) 949-962 doi:10.1180/minmag.1964.033.266.03

O'Neil, James R., Taylor, Hugh P. (1967) The oxygen isotope and cation exchange chemistry of feldspars. American Mineralogist, 52 (9-10) 1414-1437

Kastner, Miriam (1971) Authigenic feldspars in carbonate rocks. American Mineralogist, 56 (5-6) 1403-1442

MacKenzie, W.S. and J. Zussman, Eds. (1974) The Feldspars. Manchester University Press, U.K.

Williame, C., Brown, W. L. (1974) A coherent elastic model for the determination of the orientation of exsolution boundaries: Application to the feldspars. Acta Crystallographica Section A, 30 (3) 316-331 doi:10.1107/s0567739474010783

Holdren, George R., Berner, Robert A. (1979) Mechanism of feldspar weathering—I. Experimental studies. Geochimica et Cosmochimica Acta, 43 (8) 1161-1171 doi:10.1016/0016-7037(79)90109-1

Kastner, M., Siever, R. (1979) Low temperature feldspars in sedimentary rocks. American Journal of Science, 279 (4) 435-479 doi:10.2475/ajs.279.4.435

Berner, Robert A., Holdren, George R. (1979) Mechanism of feldspar weathering—II. Observations of feldspars from soils. Geochimica et Cosmochimica Acta, 43 (8) 1173-1186 doi:10.1016/0016-7037(79)90110-8

Ribbe, P.H., Ed. (1983) Feldspar Mineralogy. Reviews in Mineralogy, Mineralogical Society of America, Chantilly, Virginia.

Lehmann, G. (1984) Spectroscopy of feldspars. In: Feldspars and Feldspathoids: Structure, Properties and Occurrences (W.L. Brown, editor). NATO Adv. Study Inst. Ser. C: 421. Reidel Publishing Co., Dordrecht, The Netherlands (121-162).

Parsons, I. and Brown, W.L. (1984) Feldspars and the thermal history of igneous rocks. In: Feldspars and Feldspathoids: Structure, Properties and Occurrences (W.L. Brown, editor). NATO Adv. Study Inst. Ser. C: 421. Reidel Publishing Co., Dordrecht, The Netherlands (317-371).

Hofmeister, Anne M., Rossman, George R. (1985) A model for the irradiative coloration of smoky feldspar and the inhibiting influence of water. Physics and Chemistry of Minerals, 12 (6) 324-332 doi:10.1007/bf00654342

Holdren, George R., Speyer, Patricia M. (1985) Reaction rate-surface area relationships during the early stages of weathering—I. Initial observations. Geochimica et Cosmochimica Acta, 49 (3) 675-681 doi:10.1016/0016-7037(85)90162-0

Ruppert, L.F. (1987) Applications of cathodoluminescence of quartz and feldspar to sedimentary petrology. Scanning Microscopy, 1(1), 63-72.

Holdren, George R., Speyer, Patricia M. (1987) Reaction rate-surface area relationships during the early stages of weathering. II. Data on eight additional feldspars. Geochimica et Cosmochimica Acta, 51 (9) 2311-2318 doi:10.1016/0016-7037(87)90284-5

Angel, R. J., Hazen, R. M., McCormick, T. C., Prewitt, C. T., Smyth, J. R. (1988) Comparative compressibility of end-member feldspars. Physics and Chemistry of Minerals, 15 (4) 313-318 doi:10.1007/bf00311034

Smith J.V. and Brown, W.L. (1988) Feldspar Minerals. Crystal structures, physical, chemical, and microstructural properties, vol. 1. Springer-Verlag. New York.

Murphy, William M. (1988) Dislocations and Feldspar Dissolution: Theory and Experimental Data. Chemical Geology, 70 (1-2). 163 doi:10.1016/0009-2541(88)90679-1

Milliken, K.L. (1989) Petrography and composition of authigenic feldspars. Oligocene Frio formation, south Texas. Journal of Sedimentary Petrology: 59: 361-374.

Murphy, William M. (1989) Dislocations and feldspar dissolution. European Journal of Mineralogy, 1 (3) 315-326 doi:10.1127/ejm/1/3/0315

Graham, Colin M., Elphick, Stephen C. (1990) A re-examination of the role of hydrogen in Al−Si interdiffusion in feldspars. Contributions to Mineralogy and Petrology, 104 (4) 481-491 doi:10.1007/bf01575625

Purton, J.; Catlow., C.R.A. (1990) Computer simulation of feldspar structures. American Mineralogist, 75 (11-12). 1268-1273

Mernagh, T. P. (1991) Use of the laser Raman microprobe for discrimination amongst feldspar minerals. Journal of Raman Spectroscopy, 22 (8). 453-457 doi:10.1002/jrs.1250220806

London, David (1992) Phosphorus in S-type magmas: The P2O5 content of feldspars from peraluminous granites, pegmatites, and rhyolites. American Mineralogist, 77 (1-2) 126-145

Angel, R.J. (1994): Feldspars at high pressure. In I. Parsons, Editor, Feldspars and their reactions, NATO ASI Series C: 421: 271-312. Kluwer, Dordrecht.

Foland, K.A. (1994) Argon diffusion in feldspars. In: Feldspars and their Reactions (I. Parsons, ed.). NATO Adv. Study Inst. Ser. C, 421. Kluwer Academic Publishers, Dordrecht, The Netherlands.

Spooner, N.A. (1994) The anomalous fading of infrared-stimulated luminescence from feldspars. Radiation Measurements: 23: 625-632.

Johnson, Elizabeth A., Rossman, George R. (2003) The concentration and speciation of hydrogen in feldspars using FTIR and1H MAS NMR spectroscopy. American Mineralogist, 88 (5) 901-911 doi:10.2138/am-2003-5-620

Yang, Yan, Xia, Qunke, Zhang, Peipei (2015) Evolution of OH groups in diopside and feldspars with temperature. European Journal of Mineralogy, 27 (2) 185-192 doi:10.1127/ejm/2015/0027-2424

Pakhomova, Anna; Simonova, Dariia; Koemets, Iuliia; Koemets, Egor; Aprilis, Georgios; Bykov, Maxim; Gorelova, Liudmila; Fedotenko, Timofey; Prakapenka, Vitali; Dubrovinsky, Leonid (2020) Polymorphism of feldspars above 10 GPa. Nature Communications, 11 (1). doi:10.1038/s41467-020-16547-4

Krivovichev, S. V. (2020) FELDSPAR POLYMORPHS: DIVERSITY, COMPLEXITY, STABILITY. Zapiski RMO (Proceedings of the Russian Mineralogical Society), CXLIX (4). 16-66 doi:10.31857/s0869605520040036

Gorelova, L.A. (2023) Phase Transformations in Feldspar Group Minerals with Paracelsian Topology under High Temperature and High Pressure. Russian Geology and Geophysics, 64 (8). 950-961 doi:10.2113/rgg20234557

Moreira de Oliveira Jr, Montauban, Eon, Jean-Guillaume (2024) Maximal independence and symmetry in crystal chemistry of natural tectosilicates. Acta Crystallographica Section A Foundations and Advances, 80 (1). 52-64 doi:10.1107/s2053273323008665

Nespolo, Massimo; Souvignier, Bernd (2025) Structural analysis of twins in feldspars. II. Albite-pericline twinning and the metric pseudo-symmetry of feldspar lattice. Mineralogy and Petrology, 120 (1). 161-185 doi:10.1007/s00710-025-00950-0

Significant localities for Feldspar GroupHide

Showing 110 significant localities out of 59,092 recorded on mindat.org.

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the

symbol to view information about a locality. The

symbol next to localities in the list can be used to jump to that position on the map.

Hide all sections | Show all sections

Locality ListHide

- This locality has map coordinates listed.

- This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality.

- Good crystals or important locality for species.

- World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). ~~Struck out~~ - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.


Afghanistan
Badakhshan Kuran wa Munjan District Sar-e-Sang Sar-e-Sang River ⓘ Pitwak Mine	[Orthoclase] RWMW Collection

Antarctica
East Antarctica Victoria Land Ross Archipelago Ross Island ⓘ Mount Erebus	[Albite var: Anorthoclase] Dov Bahat (1979) +2 other references

Austria
Carinthia Wolfsberg District Wolfsberg Bad Weißenbach ⓘ Oberleidenberg	[Orthoclase] Niedermayr et al. (1995)
Lower Austria Zwettl District Waldhausen ⓘ Werschenschlag	[Microcline] Exel (1993)

Bolivia
Cochabamba Chapare Province ⓘ Alto Chapare mining district	[Plagioclase] Petrov (n.d.)

Bosnia and Herzegovina
Federation of Bosnia and Herzegovina Central Bosnia Canton Busovača Zagradski Creek ⓘ Zagradski Potok Mine	[Microcline var: Hyalophane] Jurkoviae et al. (1993)

Canada
British Columbia Osoyoos Mining Division Penticton ⓘ Shingle Creek	[Sanidine] Dave Joyce personal collection
Newfoundland and Labrador Labrador Nain Complex Paul Island ⓘ Ford Harbour	[Anorthite var: Labradorite] Dana et al. (1892)
Ontario Haliburton County Highlands East Township Monmouth Township ⓘ Dark Star Crystal Mine	Michael Gordon Collection
Québec Abitibi-Témiscamingue La Vallée-de-l'Or RCM Réservoir-Dozois ⓘ Cabonga Reservoir	[Orthoclase, Albite var: Oligoclase] Age of the Cabonga nepheline syenite +3 other references

Colombia
Caldas Department Salamina ⓘ Marmato mining district	[Albite var: Andesine] Tassinari et al. (2008)

Ethiopia
Southern Nations Nationalities and Peoples' Region ⓘ Konso	[Microcline var: Amazonite] Kaiser (2006)

France
Auvergne-Rhône-Alpes Loire Montbrison Essertines-en-Châtelneuf ⓘ Gonnard's pegmatite	[Microcline] F. Gonnard (1906)
Brittany Côtes-d'Armor Dinan Saint-Jacut-de-la-Mer ⓘ La Loge Island	[Microcline] Pierrot et al. (1975)
Provence-Alpes-Côte d'Azur Alpes-de-Haute-Provence Barcelonnette Saint-Paul-sur-Ubaye ⓘ Tête de Toillies south-west slope (Col de la Blanche; Rocca Niera south-west slope)	[Albite] Piccoli (2002) +1 other reference
Forcalquier Saint-Maime ⓘ Saint-Maime mines	[Anorthite] Favreau G. et al. (2004)

Germany
Lower Saxony Goslar District Braunlage St Andreasberg ⓘ Catharina Neufang Mine	[Albite, Albite var: Zygadite] August Breithaupt (1843)
North Rhine-Westphalia Cologne Rhein-Sieg-Kreis Königswinter ⓘ Drachenfels	[Sanidine] Nose (1808) +1 other reference

Israel
Southern District Beersheba Subdistrict Tamar Regional Council Hatrurim Basin ⓘ Gurim anticline	[Hexacelsian] Galuskina et al. (2017) +1 other reference

Italy
Campania Metropolitan City of Naples ⓘ Mount Somma	[Anorthite] Rose. G. (1823)
Piedmont Metropolitan City of Turin Fenestrelle ⓘ Punta Belvedere	[Albite] Piccoli et al. (2007)
Usseaux ⓘ Bergerie del Laux	[Albite] Giacomino et al. (1986) +1 other reference
Villar Focchiardo ⓘ Monte Muretto	[K Feldspar var: Adularia] Barresi (1996) +1 other reference
Verbano-Cusio-Ossola Province ⓘ Baveno	[Orthoclase] Bancroft (1973) +1 other reference
Mergozzo Candoglia ⓘ Candoglia marble quarries	[Paracelsian] Tacconi (1905)
Sicily Trapani Province ⓘ Pantelleria Island	[Albite var: Anorthoclase] [Foerstner] Förstner H. (1877) +18 other references
Tuscany Livorno Province Campo nell'Elba ⓘ San Piero in Campo	[Rubicline] Teertstra et al. (1998)
ⓘ Fonte del Prete	[Orthoclase] Barsotti et al. (2006)
ⓘ Grotta d'Oggi	[Orthoclase] Barsotti et al. (2006)
Sant'Ilario in Campo ⓘ Gorgolinato	[Orthoclase]

Japan
Nagano Prefecture Minamisaku District Kawakami-mura ⓘ Kobushi mine (Koubushi mine)	[K Feldspar var: Adularia] Petrov (n.d.)

Kazakhstan
Akmola Region Zerendi District Prirechnoye Lake Kumdikol (Lake Kumdykol'; Ozero Kumdykol') ⓘ Lake Kumdikol diamond deposit	[Kokchetavite, Kumdykolite] Hwang et al. (2004)

Madagascar
Anosy Betroka District Mahasoa Est ⓘ Itrongay (Itrongahy)	[Sanidine] www.mindat.org (n.d.) +1 other reference

Mexico
Guanajuato Guanajuato Municipality Guanajuato ⓘ Valenciana Mine	[K Feldspar var: Adularia] dan weinrich +1 other reference

Namibia
Erongo Region Dâures Constituency Brandberg Area Messum Igneous Complex ⓘ Messum Crater	[Microcline] von Bezing (2007)

Norway
Agder ⓘ Arendal	[Microcline] Breithaupt (1830)
Evje og Hornnes Landsverk ⓘ Landsverk 1 Feldspar Quarry (Jokeli)	[Microcline var: Amazonite] Neumann et al. (1960) +2 other references
Vestfold Larvik Commune ⓘ Stavern (Fredriksvärn)	[Microcline] Breithaupt (1830) +1 other reference

Russia
Chelyabinsk Oblast Kopeysk ⓘ Coal mine No. 45	[Svyatoslavite] Chesnokov et al. (1989) +2 other references
Kamchatka Krai Milkovsky District Tolbachik Volcanic field Great Fissure eruption (Main Fracture) Northern Breakthrough (North Breach) ⓘ Second scoria cone	[Filatovite] Vergasova et al. (2004)
ⓘ Arsenatnaya fumarole	[Ferrisanidine] Shchipalkina et al. (2019) +2 other references
Murmansk Oblast Lovozersky District Keivy Mountains Western Keivy Massif Serpovidnyi Ridge ⓘ Vein No. 1	[Microcline var: Amazonite] Lunts et al. (1972)

Spain
Community of Madrid ⓘ Cadalso de los Vidrios	[Albite] Garcia G. et al. (2004)

Sweden
Dalarna County Falun ⓘ Finnbo (Finbo)	[Albite] Gahn et al. (1815) +1 other reference
Stockholm County Stockholm ⓘ Danvikstull	[Albite var: Oligoclase] Clark (1993)
Värmland County Filipstad Nordmark mining district Jakobsberg ore field ⓘ Jakobsberg Mine	[Celsian] Sjögren (1895) +2 other references

Switzerland
Grisons Surselva Region Tujetsch ⓘ Val Giuv	[K Feldspar, K Feldspar var: Adularia] Jahn (2004)
Ticino Vallemaggia Cevio Bavona Valley Robièi (Alpe di Robièi; Lake Robièi area) Cavagnöö Glacier (Cavagnoli Glacier; Cavagnöö area; Cavagnoli area) ⓘ Pizzo dell'Arzo	[K Feldspar var: Adularia] Toroni (1987) +1 other reference
Valais Entremont Val de Bagnes Verbier ⓘ Pierre Avoi	[Albite] Erik Vercammen photo & specimen (Bought at the Fiesch-show in 2003)
Goms Binn Fäld ⓘ Lengenbach Quarry	[Microcline var: Hyalophane] - (1983) +2 other references

UK
Wales Gwynedd Aberdaron Rhiw ⓘ Benallt Mine	[Paracelsian] Spencer (1942) +1 other reference

USA
Arizona Mohave County Virgin Mountains Virgin Peak (Bunkerville Mountain) Hummingbird claims ⓘ Chad Mountain Pegmatite	[var: Perthite] Olson et al. (1960)
California Lake County Sulphur Creek Mining District (Sulfur Creek Mining District; Wilbur Springs Mining District) Clear Lake Oaks ⓘ Sulphur Bank Mine (Sulfur Bank Mine; Sulphur Bank deposits)	[Buddingtonite] Erd et al. (1964) +2 other references
San Diego County Pala Mining District Pala Chief Mountain Elizabeth R. Mine (Hazel W. claim) ⓘ Oceanview Mine (Oceanview adits; new Oceanview workings)	[Albite] Mauthner (2008)
Colorado Gunnison County Willow Creek Mining District ⓘ Seventy-Six shaft	[Albite var: Cleavelandite] The Williamson Southern Group National ...
Park County Tarryall ⓘ Park County claims	[Microcline, Microcline var: Amazonite] Fabre (n.d.)
Teller County Crystal Peak ⓘ Smoky Hawk claim	[Microcline var: Amazonite] Joseph Dorris (2015) +1 other reference
Connecticut Fairfield County Bethel ⓘ Biermann Quarries (Bethel quarries; Codfish Hill Quarry)	[K Feldspar var: Adularia] Moritz (n.d.)
Redding Branchville ⓘ Fillow Quarry	[Albite, Albite var: Cleavelandite] Cameron et al (1954) +2 other references
Trumbull Long Hill ⓘ Corporate Drive	[Albite, Albite var: Oligoclase] Moritz (n.d.)
ⓘ Old Mine Park (Old Tungsten Mine)	[Albite] Hobbs (1901) +2 other references
Hartford County New Britain ⓘ State Route 9 - Ellis Street and State Route 72 interchanges (State Route 72 roadcut)	[K Feldspar, K Feldspar var: Adularia] Miller (circa 1986)
Litchfield County Litchfield ⓘ Town Farm Road	[Albite] Brunet (1977)
Morris ⓘ Morris Dam Quarry (East Morris Dam)	[Microcline] W.C. van Laer: field notes +1 other reference
Plymouth ⓘ Terryville	[Albite] Former Ed Force collection.
Thomaston ⓘ Reynolds Bridge	[Microcline] Januzzi et al. (1976)
Middlesex County East Hampton Airline Railroad ⓘ Linkpot cut	[Microcline] Ralph Lieser of Pappy’s Beryl Shop +3 other references
ⓘ Anderson No. 1 Mica Mine	[Albite var: Cleavelandite] Shannon (1920) +1 other reference
Haddam ⓘ Arnold Quarry	[Microcline] Williams (circa 1945) +2 other references
Haddam Neck ⓘ Gillette Quarry (J-J Mine; Haddam Neck Quarry)	[Albite, Microcline, Albite var: Cleavelandite] Bowman (1902) +2 other references
ⓘ Quarry Hill (Brainerd Quarries; Shailor Quarries)	[Microcline] Moritz (n.d.)
ⓘ Hewitt Gem Quarry (Herb's Gem Quarry; Sawmill Quarry)	[Microcline var: Amazonite] Weber et al. (1995)
ⓘ Jail Hill Road locality (Jail Hill Quarry)	[Microcline var: Hyalophane] Schooner (circa 1980s)
ⓘ State Route 9 Interchange 13 - Beaver Meadow Road	[Albite] Yedlin (1967)
ⓘ Timms Hill (Tim's Hill; Iolite Hill)	[Albite, Albite var: Oligoclase] Foye (1922)
Portland Collins Hill Strickland pegmatite ⓘ Strickland Quarry	[Albite, Albite var: Cleavelandite] USGS Professional Paper 255: 333-338. +3 other references
Tolland County Union ⓘ Interstate 84 (I-84; I-86; State Route 15; Wilbur Cross Highway)	[Albite] Bartsch (1940)
Idaho Boise County ⓘ Sawtooth Wilderness Area (Sawtooth Primitive Area)	[Microcline] Ted Johnson collection
Maine Oxford County Albany ⓘ Albany Rose Quarry	[Microcline] Barry Heath and Frank Perham +1 other reference
Massachusetts Bristol County Acushnet ⓘ Acushnet Quarry	[Albite] Cahoon (2005)
Essex County Gloucester ⓘ Blackburn Circle locality	[Microcline, Microcline var: Amazonite] P Cristofono collection
Hampshire County Chesterfield ⓘ Clark Ledge pegmatite locality	[Albite var: Cleavelandite] "Western Massachusetts Mineral ... +1 other reference
Montana Flathead County Hog Heaven Mining District (Flathead Mining District) Kofford Ridge ⓘ Flathead Mine (Hog Heaven Project)	[Sanidine] Ray Lasmanis +1 other reference
New Jersey Sussex County Franklin Franklin Mine ⓘ Buckwheat pit	[Microcline] Peters et al. (1983) +1 other reference
ⓘ Trotter Mine	[Microcline] Palache (1935) +1 other reference
Ogdensburg Sterling Hill ⓘ Passaic pit (Marshall Mine; Passaic Mine)	[Microcline] Palache (1935) +1 other reference
New Mexico Otero County ⓘ Orogrande Mining District (Jarilla Mining District)	[Albite] D.Court collection
New York Essex County St. Armand Bloomingdale ⓘ Leib's Moonstone Mine	[Orthoclase] Strong (1965) +1 other reference
Westchester County Mount Pleasant ⓘ Valhalla	[Microcline var: Amazonite] Manchester (1931)
Oregon Harney County ⓘ Sunstone Butte Mine	[Labradorite var: Oregon Sunstone] ‘David Carter’ Ex-collection +2 other references
Wallowa County ⓘ Martin Bridge formation	[Slawsonite] Griffen et al. (1977) +1 other reference
Pennsylvania Delaware County Middletown Township ⓘ Sharpless' Quarry (Sharpless Quarry)	[Microcline] Gordon (1922)
Rhode Island Washington County Westerly Bradford ⓘ Sullivan Quarry (Armetta Quarry; Copar Quarry; Westerly Granite Co. Quarry)	[Albite, Albite var: Oligoclase] Miller (1971)
Texas Llano County Kingsland Granite Company Quarry (Petrick Quarry) ⓘ Petrick pegmatite	[Microcline] Self-collected by Franklin Roberts. +1 other reference
Utah Duchesne County ⓘ Joseph Smith No. 1 well	[Reedmergnerite] Milton et al. (1960)

Quick NavTop About Feldspar Group Unique Identifiers Mineral Symbols Pronunciation Age distribution Chemical Analysis Crystal Structure Synonyms Other Languages Varieties Relationships Other Information Feldspar Group in petrology Internet Links References Significant localities Locality List

Mindat.org® is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Mindat® and mindat.org® are registered trademarks of the Hudson Institute of Mineralogy.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2026, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters. Founded in 2000 by Jolyon Ralph and Ida Chau.
Content on this site may not be used to train, fine-tune, or otherwise develop artificial intelligence or machine learning models without prior written permission - see our Terms & Conditions.
To cite: Ralph, J., Von Bargen, D., Martynov, P., Zhang, J., Que, X., Prabhu, A., Morrison, S. M., Li, W., Chen, W., & Ma, X. (2025). Mindat.org: The open access mineralogy database to accelerate data-intensive geoscience research. American Mineralogist, 110(6), 833–844. doi:10.2138/am-2024-9486.
Privacy Policy - Terms & Conditions - Contact Us / DMCA issues - Report a bug/vulnerability Current server date and time: September 1, 2026 03:17:52 Page updated: August 6, 2026 11:27:25

Go to top of page