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Meymacite Mineral Data
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General Meymacite Information
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 Chemical Formula: |
WO3•2(H2O) |
| Composition: |
Molecular Weight = 267.88 gm |
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Hydrogen 1.51 % H 13.45 % H2O |
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Tungsten 68.63 % W 86.55 % WO3 |
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Oxygen 29.86 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
WO3•2(H2O) |
| Environment: |
Alteration product of scheelite. Highly questionalble species. |
| IMA Status: |
Approved IMA 1961 |
| Locality: |
Meymac, Correze, France. Link to MinDat.org Location Data. |
| Name Origin: |
Named for the locality. |
| Name Pronunciation: |
Meymacite + Pronunciation  |
| Synonym: |
ferritungstite |
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Meymacite Image |
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Images:
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Meymacite Crystallography
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| Crystal System: |
Amorphous- No Crystals |
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Physical Properties of Meymacite
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| Cleavage: |
None |
| Color: |
Yellow brown. |
| Density: |
3.94 - 4.1, Average = 4.01 |
| Fracture: |
Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz). |
| Luster: |
Vitreous - Resinous |
| Streak: |
brownish yellow |
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Optical Properties of Meymacite
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| Optical Data: |
NCalc= 1.78 - from Gladstone-Dale relationship (KC = 0.1937) where Ncalc=Dmeas*KC+1 |
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Calculated Properties of Meymacite
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| Electron Density: |
Bulk Density (Electron Density)=3.54 gm/cc
note: Specific Gravity of Meymacite =4.02 gm/cc.
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| Fermion Index: |
Fermion Index = 0.09
Boson Index = 0.91 |
| Photoelectric: |
PEMeymacite = 840.62 barns/electron
U=PEMeymacite x rElectron Density=2,977.16 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Meymacite is Not Radioactive |
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Meymacite Classification
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| Dana Class: |
04.05.03.01 (04)Simple Oxides |
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(04.05)with a cation charge of 6+ (A++++++ O3) |
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(04.05.03)Dana Group |
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04.05.03.01 Meymacite WO3•2(H2O) None |
| Strunz Class: |
04.FJ.05 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate |
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04.F - Hydroxides (without V or U) |
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04.FJ -Hydroxides with H2O � (OH); corner-sharing octahedra |
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04.FJ.05 Meymacite WO3•2(H2O) None |
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04.FJ.05 Sidwillite MoO3•2(H2O) P 21/n 2/m |
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Other Meymacite Information
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| References: |
NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) |
| See Also: |
Links to other databases for Meymacite :
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 Meymacite Specimen Label here :
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Meymacite
WO3•2(H2O)
Dana No: 04.05.03.01 Strunz No: 04.FJ.05
Locality:
Notes:
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