Mineralogy Database

Biehlite Mineral Data

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General Biehlite Information

Help on Chemical  Formula: Chemical Formula: (Sb,As)2MoO6
Help on Composition: Composition: Molecular Weight = 426.07 gm
   Antimony    51.44 %  Sb   61.57 % Sb2O3
   Molybdenum  22.52 %  Mo   33.78 % MoO3
   Arsenic      3.52 %  As    4.64 % As2O3
   Oxygen      22.53 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Sb1.8As0.2MoO6
Help on Environment: Environment: Associated with angelsite and wulfenite on a fine-grained Cu ore in the oxidation zone of the deposit.
Help on IMA Status: IMA Status: Approved IMA 1999 (Dana # Added)
Help on Locality: Locality: Tsumeb, Namibia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Friedrich Karl Bielh (1887-?), who was the first to do scientific work on the mineralization of the Tsumeb deposit.
Help on Synonym: Synonym: ICSD 411401

Biehlite Image

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Comments: White fibrous crystals of biehlite.
Location: Tsumeb, Namibia. Scale: Picture size 8 mm.
© Thomas Witzke / Abraxas-Verlag

Biehlite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =3.0533:1:0.8586
Help on Cell Dimensions: Cell Dimensions: a = 18.076, b = 5.92, c = 5.083, Z = 4; beta = 96.97° V = 539.91 Den(Calc)= 5.24
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/c
Help on X Ray Diffraction: 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),

Physical Properties of Biehlite

Help on Color: Color: White.
Help on Diaphaneity: Diaphaneity: Translucent
Help on Fracture: Fracture: Flexible - Flexible fragments.
Help on Habit: Habit: Fibrous - Crystals made up of fibers.
Help on Hardness: Hardness: 1-1.5 - Talc or a little harder
Help on Luster: Luster: Vitreous - Silky
Help on Streak: Streak: white

Optical Properties of Biehlite

Help on Gladstone-Dale: Gladstone-Dale: CI calc= -0.016 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2195,KC= 0.216
Ncalc = 2.13
Help on Optical Data: Optical Data: Biaxial (?), b=2.15

Calculated Properties of Biehlite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.63 gm/cc
note: Specific Gravity of Biehlite =5.24 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.05
Boson Index = 0.95
Help on Photoelectric: Photoelectric: PEBiehlite = 212.55 barns/electron
U=PEBiehlite x rElectron Density= 984.96 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Biehlite is Not Radioactive

Biehlite Classification

Help on  Dana Class: Dana Class: (48)Anhydrous Molybdates and Tungstates
  (48.02)where (A)2 XO4
  (48.02.04)Dana Group Biehlite! (Sb,As)2MoO6 C 2/c 2/m
Help on  Strunz Class: Strunz Class: 04.DB.60 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.D - Metal:Oxygen = 1:2 and similar
  04.DB -With medium-sized cations; chains of edge-sharing octahedra
04.DB.60 Biehlite! (Sb,As)2MoO6 C 2/c 2/m

Other Biehlite Information

Help on References: References: NAME( AmMin, Vol 86) PHYS. PROP.(AmMin, Vol 86) OPTIC PROP.(CanMin, Vol 38)
Help on See Also: 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

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Dana No: Strunz No: 04.DB.60





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