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Tungstenite Mineral Data
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General Tungstenite Information
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 Chemical Formula: |
WS2 |
| Composition: |
Molecular Weight = 247.98 gm |
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Tungsten 74.14 % W |
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Sulfur 25.86 % S |
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______ |
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100.00 % |
| Empirical Formula: |
WS2 |
| Environment: |
In a deposit replacing limestone. |
| IMA Status: |
Valid Species (Pre-IMA) 1917 |
| Locality: |
Emma mine, Little Cottonwood Canyon, Salt Lake Coynty, Utah, USA. Link to MinDat.org Location Data. |
| Name Origin: |
Named for the composition. |
| Name Pronunciation: |
Tungstenite + Pronunciation  |
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Tungstenite Image |
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Images:
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Tungstenite Crystallography
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| Axial Ratios: |
a:c = 1:3.91946 |
| Cell Dimensions: |
a = 3.154, c = 12.362, Z = 2; V = 106.50 Den(Calc)= 7.73 |
| Crystal System: |
Hexagonal - Dihexagonal Dipyramidal H-M Symbol (6/m 2/m 2/m) Space Group: P 63/mmc |
| X Ray Diffraction: |
By Intensity(I/Io): 6.18(1), 2.277(0.35), 2.731(0.25), |
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Physical Properties of Tungstenite
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| Cleavage: |
{???} Good |
| Color: |
Gray. |
| Density: |
7.4 |
| Diaphaneity: |
Opaque |
| Fracture: |
Sectile - Curved shavings or scrapings produced by a knife blade, (e.g. graphite). |
| Habit: |
Foliated - Two dimensional platy forms. |
| Hardness: |
2.5 - Finger Nail |
| Luminescence: |
Non-fluorescent. |
| Luster: |
Earthy (Dull) |
| Magnetism: |
Nonmagnetic |
| Streak: |
gray |
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Optical Properties of Tungstenite
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| RL Anisotrophism: |
Strong, in striking colors including pink and deep blue. |
| RL Color: |
Pure white. |
| RL Pleochroism: |
Very high. |
| Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Tungstenite in Air
| λ |
R1 |
R2 |
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∑ R1(λ) |
∑ R2(λ) |
| 400 nm |
24.40 |
53.40 |
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| 420 nm |
22.60 |
48.00 |
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| 440 nm |
20.80 |
48.60 |
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| 460 nm |
19.90 |
40.50 |
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| 480 nm |
19.30 |
39.00 |
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| 500 nm |
18.80 |
37.80 |
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| 520 nm |
18.50 |
36.80 |
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| 540 nm |
18.20 |
36.00 |
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| 560 nm |
18.00 |
35.30 |
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| 580 nm |
17.80 |
35.00 |
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| 600 nm |
17.80 |
34.90 |
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| 620 nm |
17.90 |
34.90 |
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| 640 nm |
18.00 |
34.80 |
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| 660 nm |
18.10 |
34.70 |
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| 680 nm |
18.00 |
34.50 |
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| 700 nm |
17.90 |
34.20 |
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Calculated Relative Intensity Colors of Tungstenite in Air
Relative
Intensity |
0% |
50% |
100% |
150% |
200% |
250% |
300% |
350% |
400% |
450% |
480% |
| R1 |
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| R2 |
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Calculated Properties of Tungstenite
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| Electron Density: |
Bulk Density (Electron Density)=6.61 gm/cc
note: Specific Gravity of Tungstenite =7.73 gm/cc.
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| Fermion Index: |
Fermion Index = 0.1
Boson Index = 0.9 |
| Photoelectric: |
PETungstenite = 937.25 barns/electron
U=PETungstenite x rElectron Density=6,193.73 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Tungstenite is Not Radioactive |
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Tungstenite Classification
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| Dana Class: |
02.12.10.03 (02)Sulfides - Including Selenides and Tellurides |
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(02.12)where Am Bn Xp, with (m+n):p=1:2 |
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(02.12.10)Molybdenite Group |
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02.12.10.01 Molybdenite MoS2 P 63/mmc 6/m 2/m 2/m |
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02.12.10.02 Drysdallite Mo(Se,S)2 P 63/mmc 6/m 2/m 2/m |
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02.12.10.03 Tungstenite WS2 P 63/mmc 6/m 2/m 2/m |
| Strunz Class: |
02.EA.30 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf |
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02.E - Metal Sulfides, M:S � 1:2 |
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02.EA -M:S = 1:2 |
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02.EA.30 Drysdallite Mo(Se,S)2 P 63/mmc 6/m 2/m 2/m |
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02.EA.30 Jordisite MoS2 None |
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02.EA.30 Molybdenite MoS2 P 63/mmc 6/m 2/m 2/m |
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02.EA.30 Tungstenite WS2 P 63/mmc 6/m 2/m 2/m |
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Other Tungstenite Information
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| References: |
NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1) |
| 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
13 - WWW-MINCRYST
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Tungstenite
WS2
Dana No: 02.12.10.03 Strunz No: 02.EA.30
Locality:
Notes:
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