Reedmergnerite
A valid IMA mineral species - grandfathered
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About Reedmergnerite
Formula:
NaBSi3O8
Colour:
Colourless to yellow-orange, salmon-orange
Lustre:
Vitreous
Hardness:
6 - 6½
Specific Gravity:
2.70 - 2.78
Crystal System:
Triclinic
Member of:
Name:
Named in honor of Frank S. Reed (b. 1894) and John L. Mergner (1894), thin section and polished section technicians at the United States Geological Survey (USGS).
Type Locality:
Unique Identifiers
Mindat ID:
3382
Long-form identifier:
mindat:1:1:3382:0
IMA Classification of Reedmergnerite
Approved, 'Grandfathered' (first described prior to 1959)
First published:
1955
Classification of Reedmergnerite
9.FA.35
9 : SILICATES (Germanates)
F : Tektosilicates without zeolitic H2O
A : Tektosilicates without additional non-tetrahedral anions
9 : SILICATES (Germanates)
F : Tektosilicates without zeolitic H2O
A : Tektosilicates without additional non-tetrahedral anions
76.1.4.1
76 : TECTOSILICATES Al-Si Framework
1 : Al-Si Framework with Al-Si frameworks
76 : TECTOSILICATES Al-Si Framework
1 : Al-Si Framework with Al-Si frameworks
17.5.2
17 : Silicates Containing other Anions
5 : Borosilicates
17 : Silicates Containing other Anions
5 : Borosilicates
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Rm | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Reedmergnerite
Vitreous
Transparency:
Transparent, Translucent
Colour:
Colourless to yellow-orange, salmon-orange
Hardness:
6 - 6½ on Mohs scale
Cleavage:
Perfect
{001}
{001}
Density:
2.70 - 2.78 g/cm3 (Measured) 2.779 g/cm3 (Calculated)
Optical Data of Reedmergnerite
Type:
Biaxial (-)
RI values:
nα = 1.554 nβ = 1.565 nγ = 1.573
2V:
Measured: 80° , Calculated: 80°
Max. Birefringence:
δ = 0.019
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
Dispersion:
none
Chemistry of Reedmergnerite
Mindat Formula:
NaBSi3O8
Element Weights:
Elements listed:
Common Impurities:
Ti,Al,Fe,Mg,Ca,Ba,K,F,H2O,P
Crystallography of Reedmergnerite
Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 7.83 Å, b = 12.36 Å, c = 6.8 Å
α = 93.31°, β = 116.35°, γ = 92.06°
α = 93.31°, β = 116.35°, γ = 92.06°
Ratio:
a:b:c = 0.633 : 1 : 0.55
Unit Cell V:
587.34 ų (Calculated from Unit Cell)
Z:
4
Comment:
Space Group: C1
Crystal Structure
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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) |
|---|---|---|---|---|---|---|---|
| 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 | |
| 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 | |
| 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 | |
| 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 | |
| 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 | |
| 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 | |
| 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 |
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 |
|---|---|
| 3.037 Å | (100) |
| 3.561 Å | (90) |
| 3.076 Å | (90) |
| 3.225 Å | (85) |
| 3.876 Å | (65) |
| 2.841 Å | (55) |
| 6.076 Å | (50) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Near-surface Processes | |
| 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 |
| 50 : Coal and/or oil shale minerals | <0.36 |
Type Occurrence of Reedmergnerite
General Appearance of Type Material:
As stubby prismatic to platy crystals, commonly wedge-shaped
Place of Conservation of Type Material:
National Museum of Natural History, Washington, D.C., USA, 106865.
Geological Setting of Type Material:
Dolomitic shale
Associated Minerals at Type Locality:
Other Language Names for Reedmergnerite
Relationship of Reedmergnerite to other Species
Member of:
Other Members of Feldspar Group:
| Alkali Feldspar | A subgroup of the Feldspar Group, poor in calcium, and mostly rich in potassium. | |
| 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 |
| Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 | |
| 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 |
Common Associates
Associations Based on Photo Data:
| 9 photos of Reedmergnerite associated with Quartz | SiO2 |
| 6 photos of Reedmergnerite associated with Telyushenkoite | (Cs,Na,K)Na6[Be2Al3Si15O39]F2 |
| 4 photos of Reedmergnerite associated with Shibkovite | K(◻K)Ca2Zn3[Si12O30] |
| 3 photos of Reedmergnerite associated with Hyalotekite | (Ba,Pb,K)4(Ca,Y)2(B,Be)2(Si,B)2Si8O28(F,Cl) |
| 3 photos of Reedmergnerite associated with Pectolite | NaCa2Si3O8(OH) |
| 2 photos of Reedmergnerite associated with Pekovite | SrB2Si2O8 |
| 2 photos of Reedmergnerite associated with Aegirine | NaFe3+Si2O6 |
| 2 photos of Reedmergnerite associated with Epididymite | Na2Be2Si6O15 · H2O |
| 1 photo of Reedmergnerite associated with Dutkevichite-(Ce) | NaZnBa2Ce2Ti2Si8O26F · H2O |
| 1 photo of Reedmergnerite associated with Yusupovite | Na2Zr(Si6O15) · 2.5H2O |
Related Minerals - Strunz-mindat Grouping
| 9.FA. | Bonaccorsiite | KK2Na3(Al6Si36)O84 |
| 9.FA. | Hexacelsian | BaAl2Si2O8 |
| 9.FA. | Wodegongjieite | KCa3(Al7Si9)O32 |
| 9.FA.05 | Panunzite | (K,Na)AlSiO4 |
| 9.FA.05 | Yoshiokaite | (Ca,Na)[Al(Al,Si)O4] |
| 9.FA.05 | Nepheline | Na3K(Al4Si4O16) |
| 9.FA.05 | Trinepheline | NaAlSiO4 |
| 9.FA.05 | Davidsmithite | (Ca,◻)2Na6Al8Si8O32 |
| 9.FA.05 | Kaliophilite | KAlSiO4 |
| 9.FA.05 | Kalsilite | KAlSiO4 |
| 9.FA.05 | 'Carnegieite' | NaAlSiO4 |
| 9.FA.05 | Megakalsilite | KAlSiO4 |
| 9.FA.05 | Trikalsilite | K2NaAl3(SiO4)3 |
| 9.FA.10 | Malinkoite | NaBSiO4 |
| 9.FA.15 | Virgilite | LiAlSi2O6 |
| 9.FA.25 | Lisitsynite | KBSi2O6 |
| 9.FA.30 | Ferrisanidine | K[Fe3+Si3O8] |
| 9.FA.30 | Buddingtonite | (NH4)(AlSi3O8) |
| 9.FA.30 | Rubicline | Rb(AlSi3O8) |
| 9.FA.30 | 'Monalbite' | NaAlSi3O8 |
| 9.FA.30 | Microcline | K(AlSi3O8) |
| 9.FA.30 va | 'Germanate-celsian' | BaAl2Ge2O8 |
| 9.FA.30 | Celsian | Ba(Al2Si2O8) |
| 9.FA.30 | Sanidine | K(AlSi3O8) |
| 9.FA.30 | Orthoclase | K(AlSi3O8) |
| 9.FA.35 | Albite | Na(AlSi3O8) |
| 9.FA.35 | Anorthite | Ca(Al2Si2O8) |
| 9.FA.40 | Paracelsian | Ba(Al2Si2O8) |
| 9.FA.45 | Svyatoslavite | Ca(Al2Si2O8) |
| 9.FA.45 | Kumdykolite | Na(AlSi3O8) |
| 9.FA.50 | Slawsonite | Sr(Al2Si2O8) |
| 9.FA.55 | Lisetite | CaNa2Al4Si4O16 |
| 9.FA.60 | Stronalsite | Na2SrAl4Si4O16 |
| 9.FA.60 | Banalsite | Na2BaAl4Si4O16 |
| 9.FA.65 | Maleevite | BaB2Si2O8 |
| 9.FA.65 | Pekovite | SrB2Si2O8 |
| 9.FA.65 | Danburite | CaB2Si2O8 |
| 9.FA.70 | Liebermannite | KAlSi3O8 |
| 9.FA.70 | Lingunite | NaAlSi3O8 |
| 9.FA.70 | Stöfflerite | CaAl2Si2O8 |
| 9.FA.75 | Pfaffenbergite | KNa3(Al4Si12)O32 |
| 9.FA.75 | Kokchetavite | K(AlSi3O8) |
Other Information
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 Reedmergnerite
mindat.org URL:
https://www.mindat.org/min-3382.html
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References for Reedmergnerite
Reference List:
Milton, C., Chao, E. C. T., Axelrod, J. M., Grimaldi, F. S. (1960) Reedmergnerite, NaBSi3O8, the boron analogue of albite, from the Green River Formation, Utah. American Mineralogist, 45 (1-2) 188-199
Fleet, Michael E. (1992) Tetrahedral-site occupancies in reedmergnerite and synthetic boron albite (NaBSi3O8) American Mineralogist, 77 (1-2) 76-84
Grew, Edward S., Belakovskiy, Dimitriy I., Fleet, Michael E., Yates, Martin G., Mcgee, James J., Marquez, Nicholas (1993) Reedmergnerite and associated minerals from peralkaline pegmatite, Dara-i-Pioz, southern Tien Shan, Tajikistan. European Journal of Mineralogy, 5 (5) 971-984 doi:10.1127/ejm/5/5/0971
Downs, R. T.; Yang, H.; Hazen, R. M.; Finger, L. W.; Prewitt, C. T. (1999) Compressibility mechanisms of alkali feldspars: new data from reedmergnerite. American Mineralogist, 84 (3). 333-340 doi:10.2138/am-1999-0316
Localities for Reedmergnerite
Showing 12 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.
China | |
| ZHANG et al. (2018) +2 other references |
Pakistan | |
| Weerth et al. (2016) |
Russia | |
| [World of Stones 95:5-6 |
| Pakhomovsky et al. (2014) | |
Tajikistan | |
| Grew et al. (1994) +7 other references |
USA | |
| Tank (1972) +1 other reference | |
| |
| Milton et al. (1960) +1 other reference |
| Bullock (1981) | |
| Milton et al. (1960) |
| Pabst et al. (1972) | |
| Milton (1977) |
Quick NavTopAbout ReedmergneriteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography Crystal StructureX-Ray Powder DiffractionGeological EnvironmentType Occurrence Other LanguagesRelationshipsCommon AssociatesStrunz-MindatOther InformationInternet Links References Localities Locality List
Dara-i-Pioz Massif, Districts of Republican Subordination, Tajikistan