Stranskiite Mineral Data

General Stranskiite Information

Chemical Formula:

Zn2Cu++(AsO4)2

Composition:

Molecular Weight = 472.16 gm

Zinc 27.70 % Zn 34.48 % ZnO

Copper 13.46 % Cu 16.85 % CuO

Arsenic 31.74 % As 48.68 % As₂O₅

Oxygen 27.11 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Zn₂Cu(AsO₄)₂

Environment:

Secondary mineral in the oxidized zone of a dolostone-hosted hydrothermal polymetallic ore deposit.

IMA Status:

Approved IMA 1960

Locality:

Tsumeb mine, Otvai, Namibia. Link to MinDat.org Location Data.

Name Origin:

Named for Iwan N. Stranski (1897-1979), German chemist and physicist, Berlin, Germany.

Name Pronunciation:

Stranskiite + Pronunciation

Synonym:

ICSD 100249

PDF 29-1422

Stranskiite Image

Images:

Stranskiite

Comments: Blue fibrous Stranskiite veinlets in white quartz.
Location: Tsumeb, Oshikoto, Namibia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Stranskiite Crystallography

Axial Ratios:

a:b:c =0.7606:1:0.7897

Cell Dimensions:

a = 5.073, b = 6.669, c = 5.267, Z = 1; alpha = 109.85°, beta = 112.14°, gamma = 86.88° V = 155.02 Den(Calc)= 5.06

Crystal System:

Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1

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

By Intensity(I/I_o): 3.134(1), 2.788(0.8), 2.506(0.6),

Physical Properties of Stranskiite

Color:

Cyanic blue.

Density:

5.23

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Habit:

Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)

Hardness:

4 - Fluorite

Optical Properties of Stranskiite

Gladstone-Dale:

CI meas= 0.012 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.019 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1651,KPDmeas= 0.16,KC= 0.162
Ncalc = 1.82 - 1.85

Optical Data:

Biaxial (-), a=1.795, b=1.842, g=1.874, bire=0.0790, 2V(Calc)=76, 2V(Meas)=80.

Calculated Properties of Stranskiite

Electron Density:

Bulk Density (Electron Density)=4.85 gm/cc
note: Specific Gravity of Stranskiite =5.23 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Stranskiite= 42.52 barns/electron
U=PE_Stranskiite x rElectron Density= 206.27 barns/cc.

Radioactivity:

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

Stranskiite Classification

Dana Class:

38.03.07.01 (38)Anhydrous Phosphates, etc

(38.03)(A+ B++)3 (XO4)2

(38.03.07)Dana Group

38.03.07.01 Stranskiite Zn2Cu(AsO4)2 P1 1

Strunz Class:

08.AB.35 08 - PHOSPHATES, ARSENATES, VANADATES

08.A - Phosphates, etc. without additional anions, without H2O

08.AB -With medium-sized cations

08.AB.35 Stranskiite Zn2Cu(AsO4)2 P1 1

08.AB.35 Mcbirneyite Cu3(VO4)2 P1 1

Other Stranskiite Information

References:

NAME( AntBidBlaNic5) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Stranskiite :
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 Stranskiite Specimen Label here :

Stranskiite

Zn2Cu++(AsO4)2
Dana No: 38.03.07.01 Strunz No: 08.AB.35
Locality:

Notes:

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