Natrolite
A valid IMA mineral species - grandfathered
This page kindly sponsored in memory of Laszlo Z. Valachi
About Natrolite
Formula:
Na2Al2Si3O10 · 2H2O
Colour:
White, colorless, red, yellow, brown, green, bluish
Lustre:
Vitreous, Pearly
Hardness:
5 - 5½
Specific Gravity:
2.2 - 2.26
Crystal System:
Orthorhombic
Member of:
Name:
Named in 1803 by Martin H. Klaproth from the Greek natron, "soda," in allusion to its sodium content and lithos, "stone." Not to be confused with natrolite (of William Hyde Wollaston) in 1812 for a soda-bearing scapolite.
Visit gemdat.org for Unique Identifiers
Mindat ID:
2947
Long-form identifier:
mindat:1:1:2947:2
Similar Names
| Natronite (of Foshag et al.) | A synonym of Natron |
IMA Classification of Natrolite
Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
Na2(Si3Al2)O10·2H2O
Classification of Natrolite
9.GA.05
9 : SILICATES (Germanates)
G : Tektosilicates with zeolitic H2O; zeolite family
A : Zeolites with T5O10 Units – The Fibrous Zeolites
9 : SILICATES (Germanates)
G : Tektosilicates with zeolitic H2O; zeolite family
A : Zeolites with T5O10 Units – The Fibrous Zeolites
Dana 7th ed.:
77.1.5.1
77.1.5.1
77 : TECTOSILICATES Zeolites
1 : Zeolite group - True zeolites
77 : TECTOSILICATES Zeolites
1 : Zeolite group - True zeolites
16.2.5
16 : Silicates Containing Aluminum and other Metals
2 : Aluminosilicates of Na
16 : Silicates Containing Aluminum and other Metals
2 : Aluminosilicates of Na
Mineral Symbols
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.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Ntr | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
| Ntr | Kretz (1983) | Kretz, R. (1983) Symbols of rock-forming minerals. American Mineralogist, 68, 277–279. |
| Ntr | 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 |
| Ntr | 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 |
| Ntr | The Canadian Mineralogist (2019) | The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download |
Physical Properties of Natrolite
Vitreous, Pearly
Transparency:
Transparent, Translucent
Colour:
White, colorless, red, yellow, brown, green, bluish
Streak:
White
Hardness:
5 - 5½ on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
on {110}
on {110}
Parting:
on {010}
Fracture:
Irregular/Uneven
Density:
2.2 - 2.26 g/cm3 (Measured) 2.25 g/cm3 (Calculated)
Optical Data of Natrolite
Type:
Biaxial (+)
RI values:
nα = 1.473 - 1.483 nβ = 1.476 - 1.486 nγ = 1.485 - 1.496
2V:
Measured: 58° to 64°, Calculated: 48° to 62°
Max. Birefringence:
δ = 0.012 - 0.013
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
Surface Relief:
Moderate (negative)
Relative to Canada balsam mounting medium (n ≈ 1.537).
Relative to Canada balsam mounting medium (n ≈ 1.537).
This shows the grain boundary and Becke line effect under plane-polarised
light, based on the contrast between this mineral's average refractive
index and the mounting medium. It does not take into account mineral
colouration.
In focus
Interference Figure:
This shows the idealized biaxial acute bisectrix (Bxa) interference figure
- the conoscopic view for a grain cut perpendicular to the acute bisectrix, using
this mineral's 2V. The two small white dots mark the melatopes - the points
where the two optic axes emerge - and are shown only when they fall within the
field of view. The coloured bands are isochromatics, and the dark bands are
isogyres.
Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
Dispersion:
r < v weak
Optical Extinction:
X = a; Y = b; Z = c.
Chemistry of Natrolite
Mindat Formula:
Na2Al2Si3O10 · 2H2O
Element Weights:
Common Impurities:
Ca,K
Crystallography of Natrolite
Crystal System:
Orthorhombic
Class (H-M):
mm2 - Pyramidal
Space Group:
Fdd2
Cell Parameters:
a = 18.2930(2) Å, b = 18.6430(5) Å, c = 6.5860(5) Å
Ratio:
a:b:c = 0.981 : 1 : 0.353
Unit Cell V:
2,246.07 ų (Calculated from Unit Cell)
Z:
8
Morphology:
Crystals short to long prismatic. From hairlike up to 1 meter in length and 10 cm wide.
Common forms:
{110}, {100}, {010}, {111}, {101}, {331}, {551}
Other forms:
{001}, {610}, {310}, {740}, {590}, {120}, {301}, {601}, {031}, {221}, {511}, {311}, {131}, {391} and more.
Common forms:
{110}, {100}, {010}, {111}, {101}, {331}, {551}
Other forms:
{001}, {610}, {310}, {740}, {590}, {120}, {301}, {601}, {031}, {221}, {511}, {311}, {131}, {391} and more.
Twinning:
On {110}, {011}, {031}.
Comment:
Data for chemically pure natrolite.
Crystallographic forms of Natrolite
Crystal Atlas:
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Natrolite no.7 - {110} - Goldschmidt (1913-1926)
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0014894 | Natrolite | Baur W H, Joswig W (1996) The phases of natrolite occurring during dehydration and rehydration studied by single crystal X-ray diffraction methods between room temperature and 923 K Neues Jahrbuch fur Mineralogie, Monatshefte 1996 171-187 | 1996 | Khibiny, Kola peninsula, Russia | 0 | 293 | |
| 0014893 | Natrolite | Baur W H, Joswig W (1996) The phases of natrolite occurring during dehydration and rehydration studied by single crystal X-ray diffraction methods between room temperature and 923 K Neues Jahrbuch fur Mineralogie, Monatshefte 1996 171-187 | 1996 | Khibiny, Kola peninsula, Russia | 0 | 293 | |
| 0014892 | Natrolite | Baur W H, Joswig W (1996) The phases of natrolite occurring during dehydration and rehydration studied by single crystal X-ray diffraction methods between room temperature and 923 K Neues Jahrbuch fur Mineralogie, Monatshefte 1996 171-187 | 1996 | Khibiny, Kola peninsula, Russia | 0 | 293 | |
| 0004618 | Natrolite | Wang H, Bish D L (2008) A PH2O-dependent structural phase transition in the zeolite natrolite American Mineralogist 93 1191-1194 |  | 2008 | synthetic | 0 | 673 |
| 0004617 | Natrolite | Wang H, Bish D L (2008) A PH2O-dependent structural phase transition in the zeolite natrolite American Mineralogist 93 1191-1194 | | 2008 | synthetic | 0 | 673 |
| 0000372 | Natrolite | Peacor D R (1973) High temperature, single-crystal X-Ray study of natrolite American Mineralogist 58 676-680 | | 1973 | 0 | 298 | |
| 0006614 | Natrolite | Stuckenschmidt E, Joswig W, Baur W H (1996) Flexibility and distortion of the collapsible framework of NAT topology: the crystal structure of H3O-natrolite European Journal of Mineralogy 8 85-92 | 1996 | 0 | 293 | ||
| 0006590 | Natrolite | Alberti A, Cruciani G, Dauru I (1995) Order-disorder in natrolite-group minerals European Journal of Mineralogy 7 501-508 | 1995 | 0 | 293 | ||
| 0007751 | Natrolite | Stuckenschmidt E, Joswig W, Baur W H (1993) Natrolite, Part I: refinement of high-order data, separation of internal and external vibrational amplitudes from displacement parameters Physics and Chemistry of Minerals 19 562-570 | 1993 | 0 | 293 | ||
| 0006462 | Natrolite | Stuckenschmidt E, Kassner D, Joswig W, Baur W H (1992) Flexibility and distortion of the collapsible framework of NAT topology: the crystal structure of NH4-exchanged natrolite European Journal of Mineralogy 4 1229-1240 | 1992 | 0 | 293 | ||
| 0006402 | Natrolite | Krogh Andersen E, Krogh Andersen I G, Ploug-Sorensen G (1990) Disorder in natrolites: structure determinations of three disordered natrolites and one lithium-exchanged disordered natrolite Example: Li II European Journal of Mineralogy 2 799-807 | 1990 | 0 | 293 | ||
| 0006401 | Natrolite | Krogh Andersen E, Krogh Andersen I G, Ploug-Sorensen G (1990) Disorder in natrolites: structure determinations of three disordered natrolites and one lithium-exchanged disordered natrolite Example: Na III European Journal of Mineralogy 2 799-807 | 1990 | 0 | 293 | ||
| 0006400 | Natrolite | Krogh Andersen E, Krogh Andersen I G, Ploug-Sorensen G (1990) Disorder in natrolites: structure determinations of three disordered natrolites and one lithium-exchanged disordered natrolite Example: Na II European Journal of Mineralogy 2 799-807 | 1990 | 0 | 293 | ||
| 0006399 | Natrolite | Krogh Andersen E, Krogh Andersen I G, Ploug-Sorensen G (1990) Disorder in natrolites: structure determinations of three disordered natrolites and one lithium-exchanged disordered natrolite Example: Na I European Journal of Mineralogy 2 799-807 | 1990 | 0 | 293 | ||
| 0006393 | Natrolite | Baur W H, Kassner D, Kim C, Sieber N H W (1990) Flexibility and distortion of the framework of natrolite: crystal structures of ion-exchanged natrolites European Journal of Mineralogy 2 761-769 | 1990 | 0 | 293 | ||
| 0006392 | Natrolite | Baur W H, Kassner D, Kim C, Sieber N H W (1990) Flexibility and distortion of the framework of natrolite: crystal structures of ion-exchanged natrolites European Journal of Mineralogy 2 761-769 | 1990 | 0 | 293 | ||
| 0006391 | Natrolite | Baur W H, Kassner D, Kim C, Sieber N H W (1990) Flexibility and distortion of the framework of natrolite: crystal structures of ion-exchanged natrolites European Journal of Mineralogy 2 761-769 | 1990 | 0 | 293 | ||
| 0018117 | Natrolite | Taylor W, Meek C, Jackson W (1933) The structures of fibrous zeolites _cod_database_code 1011255 Zeitschrift fur Kristallographie 84 373-398 | 1933 | 0 | 293 | ||
| 0000373 | Natrolite | Peacor D R (1973) High temperature, single-crystal X-Ray study of natrolite American Mineralogist 58 676-680 | | 1973 | 0 | 361 | |
| 0000374 | Natrolite | Peacor D R (1973) High temperature, single-crystal X-Ray study of natrolite American Mineralogist 58 676-680 | | 1973 | 0 | 419 | |
| 0000375 | Natrolite | Peacor D R (1973) High temperature, single-crystal X-Ray study of natrolite American Mineralogist 58 676-680 | | 1973 | 0 | 471 | |
| 0007098 | Natrolite | Seryotkin Y V, Bakakin V V, Fursenko B A, Belitsky I A, Joswig W, Radaelli P G (2005) Structural evolution of natrolite during over-hydration: a high-pressure neutron diffraction study European Journal of Mineralogy 17 305-313 | 2005 | 0.9 | 293 | ||
| 0007099 | Natrolite | Seryotkin Y V, Bakakin V V, Fursenko B A, Belitsky I A, Joswig W, Radaelli P G (2005) Structural evolution of natrolite during over-hydration: a high-pressure neutron diffraction study European Journal of Mineralogy 17 305-313 | 2005 | 1 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Loading XRD data...
Data courtesy of RRUFF project at University of Arizona, used with permission.
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 2.85 Å | (100) |
| 5.89 Å | (85) |
| 2.87 Å | (80) |
| 4.35 Å | (70) |
| 6.55 Å | (60) |
| 3.16 Å | (50) |
| 3.19 Å | (45) |
Comments:
Wingendorf, Lauban, Poland, ICDD 20-759.
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 3a: Earth’s earliest Hadean crust | >4.50 |
| 9 : Lava/xenolith minerals (hornfels, sanidinite facies) | |
| 10 : Basalt-hosted zeolite minerals | |
| Stage 3b: Earth’s earliest hydrosphere | >4.45 |
| 16 : Low-? aqueous alteration of Hadean subaerial lithologies (see also #23) | |
| 17 : Marine authigenic Hadean minerals (see also #24) | |
| Near-surface Processes | |
| 22 : Hydration and low-? subsurface aqueous alteration (see also #23) | |
| 24 : Authigenic minerals in terrestrial sediments (see also #17) | |
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 35 : Ultra-alkali and agpaitic igneous rocks | |
| Stage 10a: Neoproterozoic oxygenation/terrestrial biosphere | <0.6 |
| 53 : Other minerals with taphonomic origins | <0.4 |
Geological Setting:
Cavities in amygdaloidal basalts
Type Occurrence of Natrolite
Place of Conservation of Type Material:
Museum für Naturkunde, Humboldt-Universität-Berlin, Germany, numbers 1998-4177, 1999-4969 (type?).
Synonyms of Natrolite
Other Language Names for Natrolite
Dutch:Natroliet
German:Natrolith
Apoanalcit
Brevicit
Cockalit
Crocalit
Epinatrolith
Höganit
Lehuntit
Natrium-Mesotyp
Paleo-natrolith
Apoanalcit
Brevicit
Cockalit
Crocalit
Epinatrolith
Höganit
Lehuntit
Natrium-Mesotyp
Paleo-natrolith
Hebrew:נתרוליט
Hungarian:Nátrolit
Japanese:ソーダ沸石
Norwegian:Radyolith
Polish:Natrolit
Portuguese:Natrolite
Russian:Натролит
Simplified Chinese:钠沸石
Spanish:Natrolita
Crocalita
Epinatrolita
Crocalita
Epinatrolita
Ukrainian:Натроліт
Varieties of Natrolite
| Fargite | A red calcian natrolite. [Clark, 1993 - "Hey's Mineral Index"] (TL) Glen Farg, Perthshire, Scotland "Fargite" [Clark, 1993 - "Hey's Mineral Index"] |
| Galactite | A Ca-bearing variety of natrolite. Originally reported from Glenfarg, Tayside (Perthshire), Scotland, UK. Some galactites later turned out to be ferrierite (e.g., Zirkl, 1973). |
| Kondrikovite | Natrolite with inclusions of rinkite-like mineral, alteration product of Lovchorrite. Originally described from Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia. |
| Mooraboolite | A variety of natrolite with a higher K-content than the latter; described by Pritchard, (1901), described as impure natrolite by Spencer (1903). Originally reported from Moorabool River, Maude, Victoria, Australia. |
| Spreustein | A fine-grained natrolite replacing a hydrothermally altered sodalite and/or nepheline. Not uncommon in some nepheline-syenite pegmatites. Compare also hydronephelite. |
Relationship of Natrolite to other Species
Member of:
Other Members of Natrolite Subgroup:
| Gonnardite | (Na,Ca)2(Si,Al)5O10 · 3H2O | Orth. |
| Mesolite | Na2Ca2Si9Al6O30 · 8H2O | Orth. mm2 : Fdd2 |
| Paranatrolite | Na2Al2Si3O10 · 3H2O | Mon. m : Bb |
| Scolecite | CaAl2Si3O10 · 3H2O | Mon. m : Bb |
Common Associates
Associations Based on Photo Data:
| 886 photos of Natrolite associated with Analcime | Na(AlSi2O6) · H2O |
| 620 photos of Natrolite associated with Calcite | CaCO3 |
| 535 photos of Natrolite associated with Neptunite | KNa2Li(Fe2+)2Ti2[Si4O12]2 |
| 499 photos of Natrolite associated with Benitoite | BaTi(Si3O9) |
| 363 photos of Natrolite associated with Aegirine | NaFe3+Si2O6 |
| 198 photos of Natrolite associated with Thomsonite-Ca | NaCa2[Al5Si5O20] · 6H2O |
| 151 photos of Natrolite associated with Gonnardite | (Na,Ca)2(Si,Al)5O10 · 3H2O |
| 143 photos of Natrolite associated with Serandite | NaMn2+2Si3O8(OH) |
| 137 photos of Natrolite associated with Mesolite | Na2Ca2Si9Al6O30 · 8H2O |
| 133 photos of Natrolite associated with Prehnite | Ca2Al2Si3O10(OH)2 |
Related Minerals - Strunz-mindat Grouping
| 9.GA.05 | Scolecite | CaAl2Si3O10 · 3H2O |
| 9.GA.05 | Paranatrolite | Na2Al2Si3O10 · 3H2O |
| 9.GA.05 | Mesolite | Na2Ca2Si9Al6O30 · 8H2O |
| 9.GA.05 | Gonnardite | (Na,Ca)2(Si,Al)5O10 · 3H2O |
| 9.GA.10 | Thomsonite-Ca | NaCa2[Al5Si5O20] · 6H2O |
| 9.GA.10 | Thomsonite-Sr | Na(Sr,Ca)2[Al5Si5O20] · 7H2O |
| 9.GA.15 | Edingtonite | Ba[Al2Si3O10] · 4H2O |
| 9.GA.15 | Kalborsite | K6Al4BSi6O20(OH)4Cl |
| 9.GA.15 | Arzamastsevite | K6Al5Si6O20(OH)4Cl |
Fluorescence of Natrolite
Commonly orange to yellow.
Other Information
Electrical:
Pyroelectric, piezeoelectric.
Thermal Behaviour:
In a closed tube, becomes white and opaque. Before the blowpipe, fuses at 2, quietly, to a clear glass.
Notes:
Gelatinizes in acids.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Natrolite
mindat.org URL:
https://www.mindat.org/min-2947.html
Please feel free to link to this page.
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References for Natrolite
Reference List:
Phillips, Alexander H. (1916) Some new forms of natrolite. American Journal Of Science, S. 4 Vol. 42. 472-474
Hey, Max H. (1932) Studies on the zeolites. Part III. Natrolite and metanatrolite. Mineralogical Magazine, 23 (139) 243-289 doi:10.1180/minmag.1932.023.139.04
Murdoch, Joseph (1942) Crystallographic notes: cristobalite, stephanite, natrolite. American Mineralogist, 27 (7) 500-506
Peng, C. J. (1955) Thermal analysis study of the natrolite group. American Mineralogist, 40 (9-10) 834-856
Meier, W. M. (1960) The crystal structure of natrolite. Zeitschrift für Kristallographie, 113 (1). 430-444 doi:10.1524/zkri.1960.113.1-6.430
Foster, M.D. (1965) Composition of zeolites of the natrolite group; compositional relations among thomsonites, gonnardites and natrolites. Professional Paper 504de. US Geological Survey doi:10.3133/pp504de
Joshi, M. S., Ittyachen, M. A. (1969) Etching of Natrolite Cleavages. Journal of Applied Physics, 40 (1). 421-423 doi:10.1063/1.1657075
Pabst, A. (1971) Natrolite from the Green River Formation, Colorado, showing an intergrowth akin to twinning. American Mineralogist, 56 (3-4) 560-569
Johnson, G. K., Flotow, H. E., O'Hare, P. A. G., Wise, W. S. (1983) Thermodynamic studies of zeolites: natrolite, mesolite and scolecite. American Mineralogist, 68 (11-12) 1134-1145
Pechar, F., Schäfer, W., Will, G. (1983) A neutron diffraction refinement of the crystal structure of natural natrolite, Na2Al2Si3O10 · 2H2O. Zeitschrift für Kristallographie - Crystalline Materials, 164 (1-2) 19 doi:10.1524/zkri.1983.164.1-2.19
Akizuki, Mizuhiko, Harada, Kazuo (1988) Symmetry, twinning, and parallel growth of scolecite, mesolite, and natrolite. American Mineralogist, 73 (5-6) 613-618
Baur, Werner H., Kassner, Dethard, Kim, Choon-Hee, Sieber, Norbert H. W. (1990) Flexibility and distortion of the framework of natrolite: crystal structures of ion-exchanged natrolites. European Journal of Mineralogy, 2 (6) 761-770 doi:10.1127/ejm/2/6/0761
Ross, Malcolm, Flohr, Marta J. K., Ross, Daphne R. (1992) Crystalline solution series and order-disorder within the natrolite mineral group. American Mineralogist, 77 (7-8) 685-703
Belitsky, I. A., Fursenko, B. A., Gabuda, S. P., Kholdeev, O. V., Seryotkin, Yu. V. (1992) Structural transformations in natrolite and edingtonite. Physics and Chemistry of Minerals, 18 (8) 497-505 doi:10.1007/bf00205264
Gunter, Mickey E., Ribbe, Paul H. (1993) Natrolite group zeolites: Correlations of optical properties and crystal chemistry. Zeolites, 13 (6) 435-440 doi:10.1016/0144-2449(93)90117-l
Alberti, Alberto, Cruciani, Giuseppe, Dauru’, Ilaria (1995) Order-disorder in natrolite-group minerals. European Journal of Mineralogy, 7 (3) 501-508 doi:10.1127/ejm/7/3/0501
Coombs, Douglas S., Alberti, Alberto, Armbruster, Thomas, Artioli, Gilberto, Colella, Carmine, Galli, Ermanno, Grice, Joel D., Liebau, Friedrich, Mandarino, Joseph A., Minato, Hideo, et al. (1997) Recommended nomenclature for zeolite minerals; report of the Subcommittee on Zeolites of the International Mineralogical Association, Commission on New Minerals and Mineral Names. The Canadian Mineralogist, 35 (6). 1571-1606
Kirfel, A., Gibbs, G. V. (2000) Electron density distributions and bonded interactions for the fibrous zeolites natrolite, mesolite and scolecite and related materials. Physics and Chemistry of Minerals, 27 (4) 270-284 doi:10.1007/s002690050256
Kol’tsova, T. N. (2005) Zeolites of the natrolite-thomsonite series. Inorganic Materials, 41 (7) 750-756 doi:10.1007/s10789-005-0203-0
Localities for Natrolite
Showing 1,693 localities.
symbol to view information about a locality.
The Locality List
- 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).
All localities listed without proper references should be considered as questionable.
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Zeilberg Quarry, Maroldsweisach, Haßberge District, Lower Franconia, Bavaria, Germany