Mineralogy Database

Tungstite Mineral Data

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General Tungstite Information

Help on Chemical  Formula: Chemical Formula: WO3•(H2O)
Help on Composition: Composition: Molecular Weight = 249.86 gm
   Hydrogen   0.81 %  H     7.21 % H2O
   Tungsten  73.58 %  W    92.79 % WO3
   Oxygen    25.61 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: WO3•(H2O)
Help on Environment: Environment: Secondary mineral derived from the alteration of tungsten minerals.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1868
Help on Locality: Locality: Trubull, Connecticut. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after its composition containig tungsen (Swedish, tung sten = "heavy stone").
Help on Name Pronunciation: Name Pronunciation: Tungstite + Pronunciation Say TUNGSTITE
Help on Synonym: Synonym: ICSD 201806
  PDF 43-679

Tungstite Image

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Comments: Yellow tungstite.
Location: San Antonio de Calacalani mine, Cercado, Oruro, Bolivia. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Tungstite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.4977:1:0.4783
Help on Cell Dimensions: Cell Dimensions: a = 5.328, b = 10.704, c = 5.12, Z = 4; V = 292.00 Den(Calc)= 5.68
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pmnb
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.49(1), 2.56(0.9), 2.68(0.9),

Physical Properties of Tungstite

Help on Cleavage: Cleavage: {001} Perfect, {???} Distinct
Help on Color: Color: Yellow, Yellow green, Yellow green, Light yellow.
Help on Density: Density: 5.5
Help on Diaphaneity: Diaphaneity: Translucent to subtranslucent
Help on Habit: Habit: Earthy - Dull, clay-like texture with no visible crystalline affinities, (e.g. howlite).
Help on Habit: Habit: Pulverulent - Forms a loose, poorly-coherent powdery mass.
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: yellow

Optical Properties of Tungstite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.188 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.15 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2107,KPDmeas= 0.2176,KC= 0.1832
Ncalc = 2.01 - 2.04
Help on Optical Data: Optical Data: Biaxial (-), a=2.09, b=2.24, g=2.26, bire=0.1700

Calculated Properties of Tungstite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.91 gm/cc
note: Specific Gravity of Tungstite =5.68 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.1
Boson Index = 0.9
Help on Photoelectric: Photoelectric: PETungstite = 918.43 barns/electron
U=PETungstite x rElectron Density=4,509.66 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Tungstite is Not Radioactive

Tungstite Classification

Help on  Dana Class: Dana Class: (04)Simple Oxides
  (04.05)with a cation charge of 6+ (A++++++ O3)
  (04.05.02)Dana Group Tungstite WO3•(H2O) Pmnb 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 04.FJ.10 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.F - Hydroxides (without V or U)
  04.FJ -Hydroxides with H2O � (OH); corner-sharing octahedra
04.FJ.10 Tungstite WO3•(H2O) Pmnb 2/m 2/m 2/m

Other Tungstite Information

Help on References: References: NAME( Pough60) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32)
Help on See Also: See Also: Links to other databases for Tungstite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Dana No: Strunz No: 04.FJ.10





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