Cassedanneite Mineral Data (original) (raw)
General Cassedanneite Information
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
Images:
Cassedanneite Crystallography
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
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
Optical Data:
NCalc= 2.2 - from Gladstone-Dale relationship (KC = 0.1869) where Ncalc=Dcalc*KC+1
Calculated Properties of Cassedanneite
Electron Density:
Bulk Density (Electron Density)=5.45 gm/cc
note: Specific Gravity of Cassedanneite =6.44 gm/cc.
Fermion Index:
Fermion Index = 0.15
Boson Index = 0.85
Photoelectric:
PECassedanneite =1,241.83 barns/electron
U=PECassedanneite x rElectron Density=6,774.04 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Cassedanneite is Not Radioactive
Cassedanneite Classification
Dana Class:
43.03.02.02 (43)Compound Phosphates, etc.
(43.03)(Hydrated Normal Compound Anions)
(43.03.02)Dana Group
43.03.02.01 Embreyite Pb5(CrO4)2(PO4)2•(H2O) P 21/m 2/m
43.03.02.02 Cassedanneite Pb5(VO4)2(CrO4)2•(H2O) A2/m 2/m
Strunz Class:
07.FC.20 07 - SULFATES (SELENATES, TELLURATES)
07.F - Chromates
07.FC -With PO4, AsO4, SiO4
07.FC.20 Cassedanneite Pb5(VO4)2(CrO4)2•(H2O) A2/m 2/m
07.FC.20 Embreyite Pb5(CrO4)2(PO4)2•(H2O) P 21/m 2/m
Other Cassedanneite Information
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 - 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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Ask about Cassedanneite here :
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Print or Cut-and-Paste your Cassedanneite Specimen Label here :
Cassedanneite
Pb5(VO4)2(CrO4)2•(H2O)
Dana No: 43.03.02.02 Strunz No: 07.FC.20
Locality:
Notes: