Fedorovskite Mineral Data + 
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- 25.4.1.1 Roweite Ca2Mn2B4O7(OH)6 Pbam 2/m 2/m 2/m
- 25.4.1.2 Fedorovskite Ca2(Mg,Mn)2B4O7(OH)6 Pbam 2/m 2/m 2/m
- V/H.11-10 Fedorovskite Ca2(Mg,Mn)2B4O7(OH)6 Pbam 2/m 2/m 2/m
- V/H.11-20 Roweite Ca2Mn2B4O7(OH)6 Pbam 2/m 2/m 2/m
General Fedorovskite Information |
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 Chemical Formula: |
Ca2(Mg,Mn)2B4O7(OH)6 | ||
| Composition: |
Molecular Weight = 401.36 gm | ||
| Calcium 19.97 % Ca 27.94 % CaO | |||
| Magnesium 9.08 % Mg 15.06 % MgO | |||
| Manganese 6.84 % Mn 8.84 % MnO | |||
| Boron 10.77 % B 34.69 % B2O3 | |||
| Hydrogen 1.51 % H 13.47 % H2O | |||
| Oxygen 51.82 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Empirical Formula: |
Ca2Mg1.5Mn2+0.5B4O7(OH)6 | ||
| IMA Status: |
Approved IMA 1976 | ||
| Locality: |
Link to MinDat.org Location Data. | ||
Fedorovskite Image | |||
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Images:
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Fedorovskite Crystallography |
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| Axial Ratios: |
a:b:c =0.6813:1:0.6197 | ||
| Cell Dimensions: |
a = 8.96, b = 13.15, c = 8.15, Z = 4; V = 960.27 Den(Calc)= 2.78 | ||
| Crystal System: |
Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pbam | ||
| X Ray Diffraction: |
By Intensity(I/Io): 2.59(1), 3.92(1), 3.02(0.7), | ||
Physical Properties of Fedorovskite |
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| Cleavage: |
[100] Perfect | ||
| Color: |
Brown. | ||
| Density: |
2.65 | ||
| Diaphaniety: |
Transparent | ||
| Hardness: |
4.5 - Between Fluorite and Apatite | ||
| Streak: |
brownish | ||
Optical Properties of Fedorovskite |
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| Gladstone-Dale: |
CI meas= -0.041 (Good) - where the CI = (1-KPDmeas/KC) CI calc= 0.008 (Superior) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2248,KPDmeas= 0.2358,KC= 0.2266 |
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| Optical Data: |
Biaxial (-), a=1.619, b=1.627, g=1.629, bire=0.0100, 2V(Calc)=52, 2V(Meas)=48. | ||
Calculated Properties of Fedorovskite |
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| Electron Density: |
relectron=2.78 gm/cc |
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| Fermion Index |
Fermion Index = 0.03104 Boson Index = 0.96896 |
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| Photoelectric: |
PEFedorovskite = 4.50 barns/electron |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Fedorovskite is Not Radioactive |
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Fedorovskite Classification |
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| Dana Class: |
25.4.1.2 (25)Anhydrous Borates Containing Hydroxyl or Halogen | ||
| (25.4)Dana Type | |||
| (25.4.1)Dana Group | |||
| Strunz Class: |
V/H.11-10 V - Nitrates, Carbonates and Borates | ||
| V/H - Group borates. Planary and tetrahedral groups [B3O5]1- to [B6O10]2- | |||
| V/H.11 - Fedorovskite - Roweite series | |||
Other Fedorovskite Information |
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| References: |
PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) | ||
| See Also: |
Links to other databases for Fedorovskite : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 -École des Mines de Paris Search for Fedorovskite using: Visit our Advertisers for Fedorovskite : Translate Fedorovskite Mineral Data : Ask about Fedorovskite here : Print or Cut-and-Paste your Fedorovskite Specimen Label here :
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