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Biehlite Mineral Data
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General Biehlite Information
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 Chemical Formula: |
(Sb,As)2MoO6 |
| Composition: |
Molecular Weight = 426.07 gm |
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Antimony 51.44 % Sb 61.57 % Sb2O3 |
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Molybdenum 22.52 % Mo 33.78 % MoO3 |
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Arsenic 3.52 % As 4.64 % As2O3 |
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Oxygen 22.53 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
Sb1.8As0.2MoO6 |
| Environment: |
Associated with angelsite and wulfenite on a fine-grained Cu ore in the oxidation zone of the deposit. |
| IMA Status: |
Approved IMA 1999 (Dana # Added) |
| Locality: |
Tsumeb, Namibia. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Friedrich Karl Bielh (1887-?), who was the first to do scientific work on the mineralization of the Tsumeb deposit. |
| Synonym: |
ICSD 411401 |
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IMA1999-019a |
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Biehlite Image |
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Images:
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Biehlite Crystallography
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| Axial Ratios: |
a:b:c =3.0533:1:0.8586 |
| Cell Dimensions: |
a = 18.076, b = 5.92, c = 5.083, Z = 4; beta = 96.97° V = 539.91 Den(Calc)= 5.24 |
| Crystal System: |
Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/c |
| X Ray Diffraction: |
By Intensity(I/Io): 2.96(1)(020), 2.99(1)(600), 5.622(0.65)(110),3.104(0.61)(311), 2.104(0.42)(620), 3.376(0.3)(311), 1.962(0.32)(130), |
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Physical Properties of Biehlite
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| Color: |
White. |
| Diaphaneity: |
Translucent |
| Fracture: |
Flexible - Flexible fragments. |
| Habit: |
Fibrous - Crystals made up of fibers. |
| Hardness: |
1-1.5 - Talc or a little harder |
| Luster: |
Vitreous - Silky |
| Streak: |
white |
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Optical Properties of Biehlite
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| Gladstone-Dale: |
CI calc= -0.016 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2195,KC= 0.216
Ncalc = 2.13 |
| Optical Data: |
Biaxial (?), b=2.15 |
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Calculated Properties of Biehlite
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| Electron Density: |
Bulk Density (Electron Density)=4.63 gm/cc
note: Specific Gravity of Biehlite =5.24 gm/cc.
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| Fermion Index: |
Fermion Index = 0.05
Boson Index = 0.95 |
| Photoelectric: |
PEBiehlite = 212.55 barns/electron
U=PEBiehlite x rElectron Density= 984.96 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Biehlite is Not Radioactive |
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Biehlite Classification
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| Dana Class: |
48.02.04.01 (48)Anhydrous Molybdates and Tungstates |
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(48.02)where (A)2 XO4 |
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(48.02.04)Dana Group |
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48.02.04.01 Biehlite! (Sb,As)2MoO6 C 2/c 2/m |
| Strunz Class: |
04.DB.60 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate |
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04.D - Metal:Oxygen = 1:2 and similar |
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04.DB -With medium-sized cations; chains of edge-sharing octahedra |
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04.DB.60 Biehlite! (Sb,As)2MoO6 C 2/c 2/m |
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Other Biehlite Information
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| References: |
NAME( AmMin, Vol 86) PHYS. PROP.(AmMin, Vol 86) OPTIC PROP.(CanMin, Vol 38) |
| See Also: |
Links to other databases for Biehlite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info
13 - WWW-MINCRYST
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Print or Cut-and-Paste your Biehlite Specimen Label here :
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Biehlite
(Sb,As)2MoO6
Dana No: 48.02.04.01 Strunz No: 04.DB.60
Locality:
Notes:
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