Mineralogy Database

Tungstenite Mineral Data

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General Tungstenite Information

Help on Chemical  Formula: Chemical Formula: WS2
Help on Composition: Composition: Molecular Weight = 247.98 gm
   Tungsten  74.14 %  W
   Sulfur    25.86 %  S
            100.00 % 
Help on Empirical Formula: Empirical Formula: WS2
Help on Environment: Environment: In a deposit replacing limestone.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1917
Help on Locality: Locality: Emma mine, Little Cottonwood Canyon, Salt Lake Coynty, Utah, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the composition.
Help on Name Pronunciation: Name Pronunciation: Tungstenite + Pronunciation Say TUNGSTENITE

Tungstenite Image

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Comments: Tungstenite, variety tungstenite-2H, gray metallic flakes in rock.
Location: Rita, Utah, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Tungstenite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:3.91946
Help on Cell Dimensions: Cell Dimensions: a = 3.154, c = 12.362, Z = 2; V = 106.50 Den(Calc)= 7.73
Help on Crystal System: Crystal System: Hexagonal - Dihexagonal Dipyramidal H-M Symbol (6/m 2/m 2/m) Space Group: P 63/mmc
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 6.18(1), 2.277(0.35), 2.731(0.25),

Physical Properties of Tungstenite

Help on Cleavage: Cleavage: {???} Good
Help on Color: Color: Gray.
Help on Density: Density: 7.4
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Sectile - Curved shavings or scrapings produced by a knife blade, (e.g. graphite).
Help on Habit: Habit: Foliated - Two dimensional platy forms.
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Earthy (Dull)
Help on Magnetism: Magnetism: Nonmagnetic
Help on Streak: Streak: gray

Optical Properties of Tungstenite

Help on RL Anisotrophism: RL Anisotrophism: Strong, in striking colors including pink and deep blue.
Help on RL Color: RL Color: Pure white.
Help on RL Pleochroism: RL Pleochroism: Very high.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Tungstenite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   24.40   53.40 
 420 nm   22.60   48.00 
 440 nm   20.80   48.60 
 460 nm   19.90   40.50 
 480 nm   19.30   39.00 
 500 nm   18.80   37.80 
 520 nm   18.50   36.80 
 540 nm   18.20   36.00 
 560 nm   18.00   35.30 
 580 nm   17.80   35.00 
 600 nm   17.80   34.90 
 620 nm   17.90   34.90 
 640 nm   18.00   34.80 
 660 nm   18.10   34.70 
 680 nm   18.00   34.50 
 700 nm   17.90   34.20 
Calculated Relative Intensity Colors of Tungstenite in Air
   0%   50% 100% 150% 200% 250% 300% 350% 400% 450% 480%

Calculated Properties of Tungstenite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=6.61 gm/cc
note: Specific Gravity of Tungstenite =7.73 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.1
Boson Index = 0.9
Help on Photoelectric: Photoelectric: PETungstenite = 937.25 barns/electron
U=PETungstenite x rElectron Density=6,193.73 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Tungstenite is Not Radioactive

Tungstenite Classification

Help on  Dana Class: Dana Class: (02)Sulfides - Including Selenides and Tellurides
  (02.12)where Am Bn Xp, with (m+n):p=1:2
  (02.12.10)Molybdenite Group Molybdenite MoS2 P 63/mmc 6/m 2/m 2/m Drysdallite Mo(Se,S)2 P 63/mmc 6/m 2/m 2/m Tungstenite WS2 P 63/mmc 6/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 02.EA.30 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.E - Metal Sulfides, M:S � 1:2
  02.EA -M:S = 1:2
02.EA.30 Drysdallite Mo(Se,S)2 P 63/mmc 6/m 2/m 2/m
02.EA.30 Jordisite MoS2 None
02.EA.30 Molybdenite MoS2 P 63/mmc 6/m 2/m 2/m
02.EA.30 Tungstenite WS2 P 63/mmc 6/m 2/m 2/m

Other Tungstenite Information

Help on References: References: NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Tungstenite :
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: 02.EA.30





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