Tungstenite Mineral Data

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General Tungstenite Information

Chemical Formula:

WS2

Composition:

Molecular Weight = 247.98 gm

Tungsten 74.14 % W

Sulfur 25.86 % S

______

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

Tungstenite Image

Images:

Tungstenite

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

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 DipyramidalH-M Symbol (6/m 2/m 2/m) Space Group: P 6₃/mmc

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

By Intensity(I/I_o): 6.18(1), 2.277(0.35), 2.731(0.25),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
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S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Wyckoff R W G , Crystal Structures , 1 (1963) p.280-281, Second edition. Interscience Publishers, New York, New York

Physical Properties of Tungstenite

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

Optical Properties of Tungstenite

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	∑ 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**
Relative Intensity	0%	50%	100%	150%	200%	250%	300%	350%	400%	450%	480%
R₁
R₂

Calculated Properties of Tungstenite

Electron Density:

Bulk Density (Electron Density)=6.61 gm/cc
note: Specific Gravity of Tungstenite =7.73 gm/cc.

Fermion Index:

Fermion Index = 0.1
Boson Index = 0.9

Photoelectric:

PE_Tungstenite= 937.25 barns/electron
U=PE_Tungstenite x rElectron Density=6,193.73 barns/cc.

Radioactivity:

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

Tungstenite Classification

Dana Class:

02.12.10.03 (02)Sulfides - Including Selenides and Tellurides

(02.12)where Am Bn Xp, with (m+n):p=1:2

(02.12.10)Molybdenite Group

02.12.10.01 Molybdenite MoS2 P 6₃/mmc 6/m 2/m 2/m

02.12.10.02 Drysdallite Mo(Se,S)2 P 6₃/mmc 6/m 2/m 2/m

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

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

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 - Google Images
4 - Google Scholar
5 - Handbook of Mineralogy (MinSocAm)
6 - Handbook of Mineralogy (UofA)
7 - MinDAT
8 - MinMax(Deutsch)
9 - MinMax(English)
10 - Mineralienatlas (Deutsch)
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: