Cuprotungstite Mineral Data

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General Cuprotungstite Information
Chemical Formula:	Cu++3(WO4)2(OH)2
Composition:	Molecular Weight = 720.35 gm
	Copper    26.46 %  Cu   33.13 % CuO
	Hydrogen   0.28 %  H     2.50 % H2O
	Tungsten  51.04 %  W    64.37 % WO3
	Oxygen    22.21 %  O
	______        ______
	100.00 %      100.00 % = TOTAL OXIDE
Empirical Formula:	Cu3(WO4)2(OH)2
Environment:	Common mineral in the oxidized zone of scheelite deposits containing primary copper sulfides.
IMA Status:	Valid Species (Pre-IMA) 1869
Locality:	La Paz, Baja California Sur, Mexico. Link to MinDat.org Location Data.
Name Origin:	Named for its composition.
Cuprotungstite Image
Images:	Cuprotungstite Comments: Tan coatings of cuprotungstite on quartz. Location: Lida, Esmeralda County, Nevada, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Images:	Cuprotungstite   Jixianite Comments: Reddish brown crystal druse of jixianite with minor tan cuprotungstite. Location: Apache Mine, Hidalgo County, New Mexico, USA. Scale: See Image. © Jeff Weissman / Photographic Guide to Mineral Species
Cuprotungstite Crystallography
Axial Ratios:	a:c = 1:1.6215
Cell Dimensions:	a = 8.93, c = 14.48, Z = 7; V = 1,154.71 Den(Calc)= 7.25
Crystal System:	TetragonalSpace Group: Unk
X Ray Diffraction:	By Intensity(I/Io): 3.07(1), 1.24(0.9), 1.91(0.8),
Physical Properties of Cuprotungstite
Color:	Brown green, Olive green, Yellowish green.
Density:	7.06
Fracture:	Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Habit:	Crystalline - Fine - Occurs as well-formed fine sized crystals.
Habit:	Massive - Fibrous - Distinctly fibrous fine-grained forms.
Hardness:	4-5 - Fluorite-Apatite
Luminescence:	None.
Luster:	Vitreous - Waxy
Magnetism:	Nonmagnetic
Streak:	green
Optical Properties of Cuprotungstite
Dichroism (e):	none.
Dichroism (w):	none.
Gladstone-Dale:	CI meas= 0.077 (Fair) - where the CI = (1-KPDmeas/KC) CI calc= 0.101 (Poor) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.1572,KPDmeas= 0.1615,KC= 0.1749
Optical Data:	Uniaxial (-), e=2.1, w=2.18, bire=0.0800.
Calculated Properties of Cuprotungstite
Electron Density:	relectron=6.21 gm/cc note: rCuprotungstite =7.06 gm/cc.
Fermion Index	Fermion Index = 0.07299 Boson Index = 0.92701
Photoelectric:	PECuprotungstite = 638.45 barns/electron U=PECuprotungstite x relectron=3,967.13 barns/cc.
Radioactivity:	GRapi = 0 (Gamma Ray American Petroleum Institute Units) Cuprotungstite is Not Radioactive
Cuprotungstite Classification
Dana Class:	48.3.2.1 (48)Anhydrous Molybdates and Tungstates
	(48.3)(Basic Anhydrous)
	(48.3.2)Dana Group
	48.3.2.1 Cuprotungstite Cu3(WO4)2(OH)2 Unk Tetra
Strunz Class:	VI/G.02-20 VI - Sulfates,Chromates,Molybdates and Tungstates
	VI/G - Molybdates [MoO4]2- and wolframates [WO4]2-
	VI/G.02 - Lindgrenite - Phyllotungstite series
	VI/G.02-05 Biehlite! (Sb,As)2MoO6 C 2/c 2/m
	VI/G.02-10 Lindgrenite Cu3(MoO4)2(OH)2 P 21/n 2/m
	VI/G.02-15 Szenicsite Cu3MoO4(OH)4 Pnnm, Pnn2 Ortho
	VI/G.02-20 Cuprotungstite Cu3(WO4)2(OH)2 Unk Tetra
	VI/G.02-25 Vergasovaite! Cu3O[(Mo,S)O4][SO4] P nma 2/m 2/m 2/m
	VI/G.02-30 Ferrimolybdite Fe2(MoO4)3·8(H2O) Unk Ortho
	VI/G.02-40 Phyllotungstite CaFe3H(WO4)6·10(H2O) P 222,Pmm2,P mmm Ortho
Other Cuprotungstite Information
References:	NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Ford32)
See Also:	Links to other databases for Cuprotungstite : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 - Crocoite.com Mineral Locations 4 - EUROmin Project 5 -Google Images 6 -Google Scholar 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 -École des Mines de Paris Search for Cuprotungstite using:   Web webmineral.com [ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO] Visit our Advertisers for Cuprotungstite : AA Mineral Specimens B & L Fine Minerals Crystal Vaults 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 Rockshop.cz T G Fine Minerals Wrights Rock Shop Translate Cuprotungstite Mineral Data : Ask about Cuprotungstite 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 Cuprotungstite Specimen Label here : Cuprotungstite Cu++3(WO4)2(OH)2 Dana No: 48.3.2.1 Strunz No: VI/G.02-20 Locality:   Notes: