Tungstibite Mineral Data

General Tungstibite Information

Chemical Formula:

Sb2O3•WO3

Composition:

Molecular Weight = 523.35 gm

Antimony 46.53 % Sb 55.70 % Sb₂O₃

Tungsten 35.13 % W 44.30 % WO₃

Oxygen 18.34 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Sb₂WO₆

Environment:

Alteration product of tungsten and antimony ores.

IMA Status:

Approved IMA 1995

Locality:

The Clara Mine, near Oberwolfach, central Black Forest, Germany. Link to MinDat.org Location Data.

Name Origin:

Named after its chemical composition of tungsten (W) and antimony (Sb). Swedish, tung sten = "heavy stone" and Latin, "stibium."

Name Pronunciation:

Tungstibite + Pronunciation

Synonym:

IMA1993-059

Tungstibite Image

Images:

Tungstibite

Comments: Dark olive-green spherical aggregate of tungstibite in matrix.
Location: Clara Mine, Oberwolfach, Wolfach Valley, Black Forest, Baden-WÃ¼rttemberg, Germany. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Tungstibite Crystallography

Axial Ratios:

a:b:c =0.8966:1:0.6388

Cell Dimensions:

a = 8.59, b = 9.58, c = 6.12, Z = 4; V = 503.63 Den(Calc)= 6.90

Crystal System:

Orthorhombic - Disphenoidal H-M Symbol (2 2 2) Space Group: P 22121

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.06(1), 3.32(1), 2.73(0.6),

Physical Properties of Tungstibite

Cleavage:

{001} Perfect

Color:

Green, Dark green.

Density:

6.69

Diaphaneity:

Translucent to opaque

Fracture:

Irregular - Flat surfaces (not cleavage) fractured in an irregular pattern.

Habit:

Globular - Spherical, or nearly so, rounded forms (e.g. wavellite).

Hardness:

2 - Gypsum

Luster:

Earthy (Dull)

Streak:

greenish white

Optical Properties of Tungstibite

Gladstone-Dale:

CI meas= -0.125 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.091 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.206,KPDmeas= 0.2125,KC= 0.1888
Ncalc = 2.26 - 2.3

Optical Data:

Biaxial (+), a=2.285, b=2.4, g=2.58, bire=0.2950, 2V(Calc)=84, 2V(Meas)=82. Dispersion strong, r < v.

Calculated Properties of Tungstibite

Electron Density:

Bulk Density (Electron Density)=5.91 gm/cc
note: Specific Gravity of Tungstibite =6.90 gm/cc.

Fermion Index:

Fermion Index = 0.05
Boson Index = 0.95

Photoelectric:

PE_Tungstibite= 602.63 barns/electron
U=PE_Tungstibite x rElectron Density=3,559.51 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Tungstibite is Not Radioactive

Tungstibite Classification

Dana Class:

48.02.03.01 (48)Anhydrous Molybdates and Tungstates

(48.02)where (A)2 XO4

(48.02.03)Dana Group

48.02.03.01 Tungstibite Sb2O3•WO3 P 22121 2 2 2

Strunz Class:

04.DE.15 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate

04.D - Metal:Oxygen = 1:2 and similar

04.DE -With medium-sized cations; with various polyhedra

04.DE.15 Koechlinite Bi2MoO6 C mca 2/m 2/m 2/m

04.DE.15 Russellite Bi2WO6 P ca2₁ mm2

04.DE.15 Tungstibite Sb2O3•WO3 P 22121 2 2 2

Other Tungstibite Information

References:

NAME( MinRec) PHYS. PROP.(Am.Min.,Vol.81,p767,1996) OPTIC PROP.(MinRec)

See Also:

Links to other databases for Tungstibite :
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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Print or Cut-and-Paste your Tungstibite Specimen Label here :

Tungstibite

Sb2O3•WO3
Dana No: 48.02.03.01 Strunz No: 04.DE.15
Locality:

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