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Buryatite Mineral Data
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General Buryatite Information
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 Chemical Formula: |
Ca3(Si,Fe+++,Al)[SO4][B(OH)4](OH,O)6•12(H2O) |
| Composition: |
Molecular Weight = 730.42 gm |
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Calcium 16.46 % Ca 23.03 % CaO |
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Aluminum 0.37 % Al 0.70 % Al2O3 |
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Iron 1.53 % Fe 2.19 % Fe2O3 |
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Silicon 2.31 % Si 4.94 % SiO2 |
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Boron 1.48 % B 4.77 % B2O3 |
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Hydrogen 5.34 % H 47.73 % H2O |
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Sulfur 4.39 % S 10.96 % SO3 |
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Oxygen 68.12 % O |
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______ ______ |
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100.00 % 94.30 % = TOTAL OXIDE |
| Empirical Formula: |
Ca3Si0.6Fe3+0.2Al0.1(SO4)B(OH)14.7O0.4•12(H2O) |
| Environment: |
Found in a drill core of a kurchatovite-sakhaite ore in the Solongo deposit. Ettringite group |
| IMA Status: |
Approved IMA 2000 (Dana # Added) |
| Locality: |
Solongo boron deposit, Buryatiya, Ural Mts, Russia. Link to MinDat.org Location Data. |
| Name Origin: |
Named for the locality |
| Synonym: |
IMA2000-021 |
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Buryatite Image |
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Images:
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Buryatite
Comments: Vitreous colorless buryatite on matrix.
Location: Solongo B deposit, Buriatia (Buryatia) Republic, Transbaikalia (Zabaykalye), Eastern-Siberian Region, Russia.
Scale: Picture size 6 mm.
© Thomas Witzke / Abraxas-Verlag |
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Buryatite Crystallography
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| Axial Ratios: |
a:c = 1:1.8842 |
| Cell Dimensions: |
a = 11.14, c = 20.99, Z = 4; V = 2,255.87 Den(Calc)= 2.15 |
| Crystal System: |
Trigonal - Ditrigonal Pyramidal H-M Symbol (3m) Space Group: P 31c |
| X Ray Diffraction: |
By Intensity(I/Io): 2.596(1)(312), 2.121(0.9)(136), 3.04(0.8),9.7(0.8)(100), 1.498(0.7)(248), 1.833(0.6)(332), 2.374(0.6)(134), 2.736(0.6)(304), 3.85(0.6), |
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Physical Properties of Buryatite
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| Cleavage: |
{100} Perfect |
| Color: |
Light violet gray. |
| Diaphaneity: |
Translucent |
| Fracture: |
Sectile - Curved shavings or scrapings produced by a knife blade, (e.g. graphite). |
| Habit: |
Disseminated - Occurs in small, distinct particles dispersed in matrix. |
| Habit: |
Microscopic Crystals - Crystals visible only with microscopes. |
| Habit: |
Platy - Sheet forms (e.g. micas). |
| Hardness: |
2.5 - Finger Nail |
| Luster: |
Vitreous - Dull |
| Streak: |
white |
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Optical Properties of Buryatite
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| Gladstone-Dale: |
CI calc= 0.052 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2453,KC= 0.2589
Ncalc = 1.56 |
| Optical Data: |
Uniaxial (+), w=1.523, e=1.532, bire=0.0090. |
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Calculated Properties of Buryatite
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| Electron Density: |
Bulk Density (Electron Density)=2.26 gm/cc
note: Specific Gravity of Buryatite =2.15 gm/cc.
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| Fermion Index: |
Fermion Index = 0.0052332237
Boson Index = 0.9947667763 |
| Photoelectric: |
PEBuryatite = 2.91 barns/electron
U=PEBuryatite x rElectron Density= 6.56 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Buryatite is Not Radioactive |
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Buryatite Classification
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| Dana Class: |
31.10.02.03 (31)Hydrated Sulfates Containing Hydroxyl or Halogen |
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(31.10)miscellaneous |
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(31.10.02)Dana Group |
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31.10.02.01 Ettringite Ca6Al2(SO4)3(OH)12•26(H2O) P 63/mmc 6/m 2/m 2/m |
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31.10.02.02 Bentorite Ca6(Cr,Al)2(SO4)3(OH)12•26(H2O) P 63/mmc 6/m 2/m 2/m |
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31.10.02.03 Buryatite! Ca3(Si,Fe,Al)[SO4][B(OH)4](OH,O)6•12(H2O) P 31c 3m |
| Strunz Class: |
07.DG.15 07 - SULFATES (SELENATES, TELLURATES) |
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07.D - Sulfates (selenates, etc.) with additional anions, with H2O |
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07.DG -With large and medium sized cations; with NO3, CO3, B(OH)4, SiO4 or IO3 |
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07.DG.15 Bentorite Ca6(Cr,Al)2(SO4)3(OH)12•26(H2O) P 63/mmc 6/m 2/m 2/m |
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07.DG.15 Charlesite Ca6(Al,Si)2(SO4)2B(OH)4(OH,O)12•26(H2O) P 31c 3m |
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07.DG.15 Ettringite Ca6Al2(SO4)3(OH)12•26(H2O) P 63/mmc 6/m 2/m 2/m |
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07.DG.15 Jouravskite Ca3Mn(SO4,CO3)2(OH)6•12(H2O) P 63/m 6/m |
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07.DG.15 Sturmanite Ca6(Fe,Al,Mn)2(SO4)2[B(OH)4](OH)12•25(H2O) P 31c 3m |
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07.DG.15 Thaumasite Ca3Si(CO3)(SO4)(OH)6•12(H2O) P 63/m 6/m |
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07.DG.15 Buryatite! Ca3(Si,Fe,Al)[SO4][B(OH)4](OH,O)6•12(H2O) P 31c 3m |
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07.DG.15 Carraraite! Ca3Ge(OH)6(SO4)(CO3)•12H2O P 63/m, or P 63 Hex |
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Other Buryatite Information
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| References: |
NAME( AmMin, Vol 87, p 1509) PHYS. PROP.(AmMin, Vol 87, p 1509) OPTIC PROP.(AmMin, Vol 87, p 1509) |
| See Also: |
Links to other databases for Buryatite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info
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Buryatite
Ca3(Si,Fe+++,Al)[SO4][B(OH)4](OH,O)6•12(H2O)
Dana No: 31.10.02.03 Strunz No: 07.DG.15
Locality:
Notes:
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