Mineralogy Database

Ziesite Mineral Data

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General Ziesite Information

Help on Chemical  Formula: Chemical Formula: Cu2V+++++2O7
Help on Composition: Composition: Molecular Weight = 340.97 gm
   Vanadium  29.88 %  V    53.34 % V2O5
   Copper    37.27 %  Cu   46.66 % CuO
   Oxygen    32.85 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Cu2V5+2O7
Help on Environment: Environment: Polymorphic with blossite.
Help on IMA Status: IMA Status: Approved IMA 1973
Help on Locality: Locality: Izalco volcano, El Salvador. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Emanuel G. Sies (1884-1981), Geophysical Laboratory, Carnegie Institution, Washington D.C. USA.
Help on Name Pronunciation: Name Pronunciation: Ziesite Say ZIESITE
Help on Synonym: Synonym: ICSD 23479
  PDF 26-569

Ziesite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.9576:1:1.2586
Help on Cell Dimensions: Cell Dimensions: a = 7.689, b = 8.029, c = 10.106, Z = 4; beta = 110.25° V = 585.33 Den(Calc)= 3.87
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: A2/a
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.06(1), 3.09(1), 3.6(1),

Physical Properties of Ziesite

Help on Cleavage: Cleavage: None
Help on Color: Color: Black.
Help on Density: Density: 3.86
Help on Diaphaneity: Diaphaneity: Opaque
Help on Habit: Habit: Anhedral Grains - Granular minerals without the expression of crystal shapes
Help on Habit: Habit: Microscopic Crystals - Crystals visible only with microscopes.
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Metallic
Help on Streak: Streak: red brown

Optical Properties of Ziesite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.048 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.046 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2726,KPDmeas= 0.2733,KC= 0.2607
Ncalc = 2.01
Help on Optical Data: Optical Data: Biaxial (?), b=2.055

Calculated Properties of Ziesite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.63 gm/cc
note: Specific Gravity of Ziesite =3.87 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0009046683
Boson Index = 0.9990953317
Help on Photoelectric: Photoelectric: PEZiesite = 22.56 barns/electron
U=PEZiesite x rElectron Density= 81.95 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Ziesite is Not Radioactive

Ziesite Classification

Help on  Dana Class: Dana Class: (38)Anhydrous Phosphates, etc
  (38.05)with miscellaneous formulae
  (38.05.05)Dana Group Chervetite Pb2V2O7 P 21/a 2/m Ziesite Cu2V2O7 A2/a 2/m
Help on  Strunz Class: Strunz Class: 08.FA.10 08 - PHOSPHATES, ARSENATES, VANADATES
  08.F - Polyphosphates, Polyarsenates, [4]-Polyvanadates
  08.FA -Polyphosphates, etc., without OH and H2O; dimers of corner-sharing RO4 tetrahedra.
08.FA.10 Ziesite Cu2V2O7 A2/a 2/m

Other Ziesite Information

Help on References: References: PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Ziesite :
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: 08.FA.10





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