| Cassedanneite Mineral Data |
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- 43.3.2.1 Embreyite Pb5(CrO4)2(PO4)2·(H2O) P 21/m 2/m
- 43.3.2.2 Cassedanneite Pb5(VO4)2(CrO4)2·(H2O) A2/m 2/m
- VI/F.04-10 Embreyite Pb5(CrO4)2(PO4)2·(H2O) P 21/m 2/m
- VI/F.04-20 Cassedanneite Pb5(VO4)2(CrO4)2·(H2O) A2/m 2/m
General Cassedanneite Information |
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 Chemical Formula: |
Pb5(VO4)2(CrO4)2·(H2O) | ||
| Composition: |
Molecular Weight = 1,515.88 gm | ||
| Vanadium 6.72 % V 12.00 % V2O5 | |||
| Chromium 6.86 % Cr 13.19 % CrO3 | |||
| Hydrogen 0.13 % H 1.19 % H2O | |||
| Lead 68.34 % Pb 73.62 % PbO | |||
| Oxygen 17.94 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Empirical Formula: |
Pb5(VO4)2(CrO4)2·(H2O) | ||
| Environment: |
Associated with embreyite. | ||
| IMA Status: |
Approved IMA 1988 | ||
| Locality: |
Beresov, Ural Mountains, Russia. Link to MinDat.org Location Data. | ||
| Name Origin: |
Named for Jacques P. Cassedanne (1928-), Brazilian mineralogist. | ||
Cassedanneite Image | |||
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Images:
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Cassedanneite Crystallography |
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| Axial Ratios: |
a:b:c =1.3348:1:1.6996 | ||
| Cell Dimensions: |
a = 7.693, b = 5.763, c = 9.795, Z = 1; beta = 115.93° V = 390.54 Den(Calc)= 6.44 | ||
| Crystal System: |
Monoclinic - PrismaticH-M Symbol (2/m) Space Group: A2/m | ||
| X Ray Diffraction: |
By Intensity(I/Io): 3.15(1), 3.22(0.6), 4.83(0.6), | ||
Physical Properties of Cassedanneite |
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| Color: |
Red orange. | ||
| Habit: |
Microscopic Crystals - Crystals visible only with microscopes. | ||
| Habit: |
Platy - Sheet forms (e.g. micas). | ||
| Hardness: |
3.5 - Copper Penny | ||
| Luster: |
Resinous - Greasy | ||
| Streak: |
yellow orange | ||
Optical Properties of Cassedanneite |
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| Optical Data: |
NCalc= 2.2 - from Gladstone-Dale relationship (KC = 0.1869) where Ncalc=Dcalc*KC+1 |
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Calculated Properties of Cassedanneite |
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| Electron Density: |
relectron=5.45 gm/cc |
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| Fermion Index |
Fermion Index = 0.1578 Boson Index = 0.8422 |
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| Photoelectric: |
PECassedanneite =1,241.83 barns/electron |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Cassedanneite is Not Radioactive |
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Cassedanneite Classification |
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| Dana Class: |
43.3.2.2 (43)Compound Phosphates, etc. | ||
| (43.3)(Hydrated Normal Compound Anions) | |||
| (43.3.2)Dana Group | |||
| Strunz Class: |
VI/F.04-20 VI - Sulfates,Chromates,Molybdates and Tungstates | ||
| VI/F - Chromates [CrO4]2- | |||
| VI/F.04 - Embreyite - Cassedanneite series | |||
Other Cassedanneite Information |
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| References: |
NAME( Dana8) PHYS. PROP.(Dana8) | ||
| See Also: |
Links to other databases for Cassedanneite : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 -École des Mines de Paris Search for Cassedanneite using: Visit our Advertisers for Cassedanneite : Translate Cassedanneite Mineral Data : Ask about Cassedanneite here : Print or Cut-and-Paste your Cassedanneite Specimen Label here :
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