Ziesite Mineral Data

General Ziesite Information

Chemical Formula:

Cu2V+++++2O7

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

Empirical Formula:

Cu₂V⁵⁺₂O₇

Environment:

Polymorphic with blossite.

IMA Status:

Approved IMA 1973

Locality:

Izalco volcano, El Salvador. Link to MinDat.org Location Data.

Name Origin:

Named for Emanuel G. Sies (1884-1981), Geophysical Laboratory, Carnegie Institution, Washington D.C. USA.

Name Pronunciation:

Ziesite

Synonym:

ICSD 23479

PDF 26-569

Ziesite Crystallography

Axial Ratios:

a:b:c =0.9576:1:1.2586

Cell Dimensions:

a = 7.689, b = 8.029, c = 10.106, Z = 4; beta = 110.25° V = 585.33 Den(Calc)= 3.87

Crystal System:

Monoclinic - Prismatic H-M Symbol (2/m) Space Group: A2/a

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.06(1), 3.09(1), 3.6(1),

Physical Properties of Ziesite

Cleavage:

None

Color:

Black.

Density:

3.86

Diaphaneity:

Opaque

Habit:

Anhedral Grains - Granular minerals without the expression of crystal shapes

Habit:

Microscopic Crystals - Crystals visible only with microscopes.

Luminescence:

Non-fluorescent.

Luster:

Metallic

Streak:

red brown

Optical Properties of Ziesite

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

Optical Data:

Biaxial (?), b=2.055

Calculated Properties of Ziesite

Electron Density:

Bulk Density (Electron Density)=3.63 gm/cc
note: Specific Gravity of Ziesite =3.87 gm/cc.

Fermion Index:

Fermion Index = 0.0009046683
Boson Index = 0.9990953317

Photoelectric:

PE_Ziesite= 22.56 barns/electron
U=PE_Ziesite x rElectron Density= 81.95 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Ziesite is Not Radioactive

Ziesite Classification

Dana Class:

38.05.05.02 (38)Anhydrous Phosphates, etc

(38.05)with miscellaneous formulae

(38.05.05)Dana Group

38.05.05.01 Chervetite Pb2V2O7 P 2₁/a 2/m

38.05.05.02 Ziesite Cu2V2O7 A2/a 2/m

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

References:

PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)

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
15 - WWW-MINCRYST

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Print or Cut-and-Paste your Ziesite Specimen Label here :

Ziesite

Cu2V+++++2O7
Dana No: 38.05.05.02 Strunz No: 08.FA.10
Locality:

Notes:

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