Tungstite Mineral Data
General Tungstite Information
Chemical Formula:
WO3•(H2O)
Composition:
Molecular Weight = 249.86 gm
Hydrogen 0.81 % H 7.21 % H2 O
Tungsten 73.58 % W 92.79 % WO3
Oxygen 25.61 % O
______ ______
100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula:
WO3 •(H2 O)
Environment:
Secondary mineral derived from the alteration of tungsten minerals.
IMA Status:
Valid Species (Pre-IMA) 1868
Locality:
Trubull, Connecticut. Link to MinDat.org Location Data.
Name Origin:
Named after its composition containig tungsen (Swedish, tung sten = "heavy stone").
Name Pronunciation:
Tungstite + Pronunciation
Synonym:
ICSD 201806
PDF 43-679
Tungstite Image
Images:
Tungstite Crystallography
Axial Ratios:
a:b:c =0.4977:1:0.4783
Cell Dimensions:
a = 5.328, b = 10.704, c = 5.12, Z = 4; V = 292.00 Den(Calc)= 5.68
Crystal System:
Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pmnb
X Ray Diffraction:
By Intensity(I/Io ): 3.49(1), 2.56(0.9), 2.68(0.9),
Physical Properties of Tungstite
Cleavage:
{001} Perfect, {???} Distinct
Color:
Yellow, Yellow green, Yellow green, Light yellow.
Density:
5.5
Diaphaneity:
Translucent to subtranslucent
Habit:
Earthy - Dull, clay-like texture with no visible crystalline affinities, (e.g. howlite).
Habit:
Pulverulent - Forms a loose, poorly-coherent powdery mass.
Hardness:
2.5 - Finger Nail
Luminescence:
Non-fluorescent.
Luster:
Earthy (Dull)
Magnetism:
Nonmagnetic
Streak:
yellow
Optical Properties of Tungstite
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
Optical Data:
Biaxial (-), a=2.09, b=2.24, g=2.26, bire=0.1700
Calculated Properties of Tungstite
Electron Density:
Bulk Density (Electron Density)=4.91 gm/cc note: Specific Gravity of Tungstite =5.68 gm/cc.
Fermion Index:
Fermion Index = 0.1 Boson Index = 0.9
Photoelectric:
PETungstite = 918.43 barns/electronU=PETungstite x r Electron Density=4,509.66 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Tungstite is Not Radioactive
Tungstite Classification
Dana Class:
04.05.02.01 (04) Simple Oxides
(04.05) with a cation charge of 6+ (A++++++ O3)
(04.05.02) Dana Group
04.05.02.01 Tungstite WO3•(H2O) Pmnb 2/m 2/m 2/m
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
References:
NAME( Pough60) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32)
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
15 - WWW-MINCRYST
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Print or Cut-and-Paste your Tungstite Specimen Label here :
Tungstite
WO3•(H2O)
Dana No: 04.05.02.01 Strunz No: 04.FJ.10
Locality:
Notes:
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