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Alumotungstite Mineral Data
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General Alumotungstite Information
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Chemical Formula: |
(W,Al)(O,OH)3 (?) |
Composition: |
Molecular Weight = 216.36 gm |
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Aluminum 1.25 % Al 2.36 % Al2O3 |
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Hydrogen 0.09 % H 0.83 % H2O |
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Tungsten 76.48 % W 96.44 % WO3 |
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Oxygen 22.18 % O |
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______ ______ |
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100.00 % 99.63 % = TOTAL OXIDE |
Empirical Formula: |
W0.9Al0.1O2.8(OH)0.2 |
Environment: |
Originally reported as the aluminum analog of ferritungstite. |
IMA Status: |
Approved IMA 1971 |
Locality: |
Kramat Pulai mine, Kinta district, Perak, Malaysia. Link to MinDat.org Location Data. |
Name Origin: |
Named for the composition. |
Name Pronunciation: |
Alumotungstite + Pronunciation |
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Alumotungstite Image |
Images:
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Alumotungstite
Comments: Pale orange, chalky crust of alumotungstite on ferberite with quartz.
Location: Hemerdon mine, Sparkwell, Plympton, Devon, England.
Scale: See Image.
© Rruff Database |
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Alumotungstite Crystallography
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Cell Dimensions: |
a = 10.2, Z = 8; V = 1,061.21 Den(Calc)= 2.71 |
Crystal System: |
Isometric Space Group: Unk |
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Physical Properties of Alumotungstite
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Color: |
Greenish yellow. |
Habit: |
Microscopic Crystals - Crystals visible only with microscopes. |
Streak: |
yellow |
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Optical Properties of Alumotungstite
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Gladstone-Dale: |
CI calc= -0.924 (Poor) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.3321,KC= 0.1726 Ncalc = 1.47 |
Optical Data: |
Isotropic, n=1.9. |
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Calculated Properties of Alumotungstite
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Electron Density: |
Bulk Density (Electron Density)=2.31 gm/cc note: Specific Gravity of Alumotungstite =2.71 gm/cc. |
Fermion Index: |
Fermion Index = 0.1 Boson Index = 0.9 |
Photoelectric: |
PEAlumotungstite = 969.30 barns/electron U=PEAlumotungstite x rElectron Density=2,236.32 barns/cc. |
Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Alumotungstite is Not Radioactive |
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Alumotungstite Classification
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Dana Class: |
04.05.04.01 (04)Simple Oxides |
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(04.05)with a cation charge of 6+ (A++++++ O3) |
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(04.05.04)Dana Group |
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04.05.04.01 Alumotungstite (W,Al)(O,OH)3(?) Unk Cubic |
Strunz Class: |
04.DH.15 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate |
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04.D - Metal:Oxygen = 1:2 and similar |
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04.DH -With large (� medium-sized) cations; sheets of edge-sharing octahedra |
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04.DH.15 Alumotungstite (W,Al)(O,OH)3(?) Unk Cubic |
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04.DH.15 Betafite (Ca,U)2(Ti,Nb,Ta)2O6(OH) F d3m 4/m 3 2/m |
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04.DH.15 Ferritungstite (K,Ca,Na)(W,Fe)2(O,OH)6•(H2O) F d3m 4/m 3 2/m |
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04.DH.15 Cesstibtantite (Cs,Na)SbTa4O12 F d3m 4/m 3 2/m |
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04.DH.15 Bismutomicrolite (Bi,Ca)(Ta,Nb)2O6(OH) F d3m 4/m 3 2/m |
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04.DH.15 Ceriopyrochlore-(Ce) (Ce,Ca,Y)2(Nb,Ta)2O6(OH,F) F d3m 4/m 3 2/m |
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04.DH.15 Bariopyrochlore (Ba,Sr)(Nb,Ti)2(O,OH)7 F d3m 4/m 3 2/m |
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04.DH.15 Bariomicrolite Ba(Ta,Nb)2(O,OH)7 F d3m 4/m 3 2/m |
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04.DH.15 Calciobetafite Ca2(Ti,Nb)2(O,OH)7 F d3m 4/m 3 2/m |
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04.DH.15 Jixianite Pb(W,Fe)2(O,OH)7 F d3m 4/m 3 2/m |
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04.DH.15 Plumbomicrolite (Pb,Ca,U)2Ta2O6(OH) F d3m 4/m 3 2/m |
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04.DH.15 Kalipyrochlore (H2O,Sr)(Nb,Ti)(O,OH)6•(H2O,K) F d3m 4/m 3 2/m |
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04.DH.15 Plumbopyrochlore (Pb,Y,U,Ca)2-xNb2O6(OH) F d3m 4/m 3 2/m |
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04.DH.15 Strontiopyrochlore* Sr2Nb2(O,OH)7 F d3m 4/m 3 2/m |
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04.DH.15 Uranmicrolite (U,Ca)2(Ta,Nb)2O6(OH) F d3m 4/m 3 2/m |
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04.DH.15 Pyrochlore (Na,Ca)2Nb2O6(OH,F) F d3m 4/m 3 2/m |
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04.DH.15 Microlite (Na,Ca)2Ta2O6(O,OH,F) F d3m 4/m 3 2/m |
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04.DH.15 Natrobistantite (Na,Cs)Bi(Ta,Nb,Sb)4O12 F d3m 4/m 3 2/m |
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04.DH.15 Plumbobetafite (Pb,U,Ca)(Ti,Nb)2O6(OH,F) F d3m 4/m 3 2/m |
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04.DH.15 Stibiomicrolite (Sb,Ca,Na)2(Ta,Nb)2(O,OH)7 F d3m 4/m 3 2/m |
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04.DH.15 Stannomicrolite (Sn,Fe,Mn)(Ta,Nb,Sn)2(O,OH)7 F d3m 4/m 3 2/m |
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04.DH.15 Stibiobetafite (Sb,Ca)2(Ti,Nb,Ta)2(O,OH)7 F d3m 4/m 3 2/m |
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04.DH.15 Uranpyrochlore (U,Ca,Ce)2(Nb,Ta)2O6(OH,F) F d3m 4/m 3 2/m |
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04.DH.15 Bismutopyrochlore! (Bi,U,Ca,Pb)1x(Nb,Ta)2O6(OH)•n(H2O) F d3m 4/m 3 2/m |
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04.DH.15 Fluornatromicrolite! (Na,Ca,Bi)2Ta2O6F F d3m 4/m 3 2/m |
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04.DH.15 Yttrobetafite-(Y) (Y,U,Ce)2(Ti,Nb,Ta)2O6(OH) F d3m 4/m 3 2/m |
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04.DH.15 Yttropyrochlore-(Y) (Y,Na,Ca,U)1-2(Nb,Ta,Ti)2(O,OH)7 F d3m 2/m 3 |
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04.DH.15 Elsmoreite! WO3•0.5(H2O) F d3m 4/m 3 2/m |
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Other Alumotungstite Information
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References: |
NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8) |
See Also: |
Links to other databases for Alumotungstite :
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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Print or Cut-and-Paste your Alumotungstite Specimen Label here :
Alumotungstite
(W,Al)(O,OH)3 (?)
Dana No: 04.05.04.01 Strunz No: 04.DH.15
Locality:
Notes:
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