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Cassedanneite Mineral Data

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General Cassedanneite Information

Help on Chemical  Formula: Chemical Formula: Pb5(VO4)2(CrO4)2•(H2O)
Help on Composition: 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
Help on Empirical Formula: Empirical Formula: Pb5(VO4)2(CrO4)2•(H2O)
Help on Environment: Environment: Associated with embreyite.
Help on IMA Status: IMA Status: Approved IMA 1988
Help on Locality: Locality: Beresov, Ural Mountains, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Jacques P. Cassedanne (1928-), Brazilian mineralogist.

Cassedanneite Image

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Comments: Crystalline mass of cassedanneite, colored green by included descloizite.
Location: Berezovskoye Mine, near Yekaterinburg, Sverdlovsk District, Middle Urals, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Cassedanneite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.3348:1:1.6996
Help on Cell Dimensions: Cell Dimensions: a = 7.693, b = 5.763, c = 9.795, Z = 1; beta = 115.93° V = 390.54 Den(Calc)= 6.44
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: A2/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.15(1), 3.22(0.6), 4.83(0.6),

Physical Properties of Cassedanneite

Help on Color: Color: Red orange.
Help on Habit: Habit: Microscopic Crystals - Crystals visible only with microscopes.
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Hardness: Hardness: 3.5 - Copper Penny
Help on Luster: Luster: Resinous - Greasy
Help on Streak: Streak: yellow orange

Optical Properties of Cassedanneite

Help on Optical Data: Optical Data: NCalc= 2.2 - from Gladstone-Dale relationship (KC = 0.1869) where Ncalc=Dcalc*KC+1

Calculated Properties of Cassedanneite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.45 gm/cc
note: Specific Gravity of Cassedanneite =6.44 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.15
Boson Index = 0.85
Help on Photoelectric: Photoelectric: PECassedanneite =1,241.83 barns/electron
U=PECassedanneite x rElectron Density=6,774.04 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Cassedanneite is Not Radioactive

Cassedanneite Classification

Help on  Dana Class: Dana Class: (43)Compound Phosphates, etc.
  (43.03)(Hydrated Normal Compound Anions)
  (43.03.02)Dana Group Embreyite Pb5(CrO4)2(PO4)2•(H2O) P 21/m 2/m Cassedanneite Pb5(VO4)2(CrO4)2•(H2O) A2/m 2/m
Help on  Strunz Class: 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

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8)
Help on See Also: 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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Dana No: Strunz No: 07.FC.20





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