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General Chervetite Information |
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 Chemical Formula: |
Pb2V2O7 | ||
| Composition: |
Molecular Weight = 628.28 gm | ||
| Vanadium 16.22 % V 28.95 % V2O5 | |||
| Lead 65.96 % Pb 71.05 % PbO | |||
| Oxygen 17.83 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Empirical Formula: |
Pb2V5+2O7 | ||
| Environment: |
Oxidized zone of a vanadium- and lead-bearing uranium deposit. | ||
| IMA Status: |
Approved IMA 1963 | ||
| Locality: |
Mounana uranium mine, Franceville, Gabon. Link to MinDat.org Location Data. | ||
| Name Origin: |
Named for Jean Chervet, French mineralogist. | ||
| Name Pronunciation: |
Chervetite + Pronunciation  |
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| Synonym: |
ICSD 2901 | ||
| PDF 47-1735 | |||
Chervetite Image | |||
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Images:
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Chervetite Crystallography |
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| Axial Ratios: |
a:b:c =1.8401:1:0.9494 | ||
| Cell Dimensions: |
a = 13.47, b = 7.32, c = 6.95, Z = 4; beta = 107.417° V = 653.85 Den(Calc)= 6.38 | ||
| Crystal System: |
Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/a | ||
| X Ray Diffraction: |
By Intensity(I/Io): 3.428(1), 3.441(1), 3.206(0.8), | ||
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Crystal Structure:
Mouse |
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Physical Properties of Chervetite |
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| Cleavage: |
{100} Indistinct | ||
| Color: |
Brown, Colorless, Gray. | ||
| Density: |
6.3 - 6.49, Average = 6.39 | ||
| Diaphaneity: |
Transparent to Translucent | ||
| Hardness: |
2-2.5 - Gypsum-Finger Nail | ||
| Luster: |
Adamantine | ||
| Streak: |
white | ||
Optical Properties of Chervetite |
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| Gladstone-Dale: |
CI meas= -0.135 (Poor) - where the CI = (1-KPDmeas/KC) CI calc= -0.137 (Poor) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2194,KPDmeas= 0.2189,KC= 0.1929 Ncalc = 2.22 - 2.25 |
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| Optical Data: |
Biaxial (-), b=2.2-2.6, 2V(Meas)=65-75. | ||
Calculated Properties of Chervetite |
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| Electron Density: |
Bulk Density (Electron Density)=5.42 gm/cc note: Specific Gravity of Chervetite =6.40 gm/cc. |
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| Fermion Index: |
Fermion Index = 0.14 Boson Index = 0.86 |
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| Photoelectric: |
PEChervetite =1,199.27 barns/electron U=PEChervetite x rElectron Density=6,494.08 barns/cc. |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Chervetite is Not Radioactive |
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Chervetite Classification |
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| Dana Class: |
38.05.05.01 (38)Anhydrous Phosphates, etc | ||
| (38.05)with miscellaneous formulae | |||
| (38.05.05)Dana Group | |||
| Strunz Class: |
08.FA.15 08 - PHOSPHATES, ARSENATES, VANADATES | ||
| 08.F - Polyphosphates, Polyarsenates, [4]-Polyvanadates | |||
| 08.FA -Polyphosphates, etc., without OH and H2O; dimers of corner-sharing RO4 tetrahedra. | |||
Other Chervetite Information |
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| References: |
NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) | ||
| See Also: |
Links to other databases for Chervetite : 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 - MinDAT 10 - Mineralienatlas (Deutsch) 11 - Online Mineral Museum 12 - QUT Mineral Atlas 13 - Ruff.Info 14 - WWW-MINCRYST Search for Chervetite using: Visit our Advertisers for Chervetite : A Bijoux Google Search for ChervetiteAdam's Minerals Google Search for Chervetite Cape Minerals Google Search for Chervetite Dakota Matrix Minerals Google Search for Chervetite Excalibur Mineral Corp. Google Search for Chervetite Exceptional Minerals Google Search for Chervetite John Betts Fine Minerals Search for Chervetite McDougall Minerals Google Search for Chervetite Mineral News Website Link Rock and Mineral Shows Google Search for Chervetite Weinrich Minerals, Inc. Google Search for Chervetite Ask about Chervetite here : Print or Cut-and-Paste your Chervetite Specimen Label here :
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