Tungstenite Mineral Data +

Heliodor

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.
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
X Ray Diffraction:	By Intensity(I/Io): 6.18(1), 2.277(0.35), 2.731(0.25),
Crystal Structure: Mouse drag1 - LMB Manipulate Structure drag2 - RMB Resize/Rotate Keyboard 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
Diaphaniety:	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:	relectron=6.61 gm/cc note: rTungstenite =7.73 gm/cc.
Fermion Index	Fermion Index = 0.1078 Boson Index = 0.8922
Photoelectric:	PETungstenite = 937.25 barns/electron U=PETungstenite x relectron=6,193.72 barns/cc.
Radioactivity:	GRapi = 0 (Gamma Ray American Petroleum Institute Units) Tungstenite is Not Radioactive
Tungstenite Classification
Dana Class:	2.12.10.3 (2)Sulfides - Including Selenides and Tellurides
	(2.12)where Am Bn Xp, with (m+n):p=1:2
	(2.12.10)Dana Group
	2.12.10.1 Molybdenite MoS2 P 63/mmc 6/m 2/m 2/m
	2.12.10.2 Drysdallite Mo(Se,S)2 P 63/mmc 6/m 2/m 2/m
	2.12.10.3 Tungstenite WS2 P 63/mmc 6/m 2/m 2/m
Strunz Class:	II/D.25-40 II - Sulfides and sulphosalts
	II/D - Sulfides with metal: sulfur, selenium and tellurium < 1:1, Tellurides with Copper, Silver, Gold
	II/D.25 - Molybdenite series
	II/D.25-05 IMA1999-004a! ReS2 P1 1
	II/D.25-10 Molybdenite MoS2 P 63/mmc 6/m 2/m 2/m
	II/D.25-20 Jordisite MoS2 None
	II/D.25-30 Drysdallite Mo(Se,S)2 P 63/mmc 6/m 2/m 2/m
	II/D.25-40 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 (UofA) 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas 11 - WWW-MINCRYST Search for Tungstenite using:   Web webmineral.com [ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO] Visit our Advertisers for Tungstenite : AA Mineral Specimens B & L Fine Minerals Dan Weinrich Fine Minerals Dan Weinrich Auctions e-Rocks Auctions Excalibur Minerals Exceptional Minerals Fabre Minerals Greenside Minerals Heliodor John Betts Fine Minerals Mason's Minerals Mineral News Mineral of the Month Club MineralsWeb Fine Minerals T G Fine Minerals Wrights Rock Shop Translate Tungstenite Mineral Data : Ask about Tungstenite here : Ask-A-Mineralogist from the Mineralogical Society of America Mindat.org's Discussion Groups Original Rockhounds Discussion Group Rockhounds Discussion Group on Yahoo Groups Mineral Discussion Forum from Fabre Minerals - also available in Español Print or Cut-and-Paste your Tungstenite Specimen Label here : Tungstenite WS2 Dana No: 2.12.10.3 Strunz No: II/D.25-40 Locality:   Notes: