Zincovoltaite Mineral Data

General Zincovoltaite Information

Chemical Formula:

K2Zn5Fe+++3Al(SO4)12•18(H2O)

Composition:

Molecular Weight = 2,076.71 gm

Potassium 3.77 % K 4.54 % K₂O

Aluminum 1.30 % Al 2.45 % Al₂O₃

Zinc 15.74 % Zn 19.60 % ZnO

Iron 8.07 % Fe 11.53 % Fe₂O₃

Hydrogen 1.75 % H 15.61 % H₂O

Sulfur 18.53 % S 46.26 % SO₃

Oxygen 50.85 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

K₂Zn₅Fe³⁺₃Al(SO₄)₁₂•18(H₂O)

Environment:

Oxidation zone of a Zn-Pb-Fe sulfide deposit, formed in an arid climate.

IMA Status:

Approved IMA 1987

Locality:

Xitieshan Pbï¿½Zn mine, south of Mt. Qilianshan, Chaidamu, Qinghai Province, China. Link to MinDat.org Location Data.

Name Origin:

Named as the zinc analog of voltaite.

Name Pronunciation:

Zincovoltaite + Pronunciation

Zincovoltaite Crystallography

Cell Dimensions:

a = 27.18, Z = 16; V = 20,079.29 Den(Calc)= 2.75

Crystal System:

Isometric - Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: F d3c

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

By Intensity(I/I_o): 3.39(1), 3.54(0.67), 5.53(0.48),

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Physical Properties of Zincovoltaite

Cleavage:

None

Color:

Green, Greenish black, Black.

Density:

2.756

Diaphaneity:

Transparent to Translucent

Hardness:

3 - Calcite

Luster:

Vitreous - Resinous

Streak:

gray green

Optical Properties of Zincovoltaite

Gladstone-Dale:

CI meas= -0.015 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.017 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.22,KPDmeas= 0.2195,KC= 0.2162
Ncalc = 1.59 - 1.6

Optical Data:

Isotropic, n=1.605.

Calculated Properties of Zincovoltaite

Electron Density:

Bulk Density (Electron Density)=2.75 gm/cc
note: Specific Gravity of Zincovoltaite =2.76 gm/cc.

Fermion Index:

Fermion Index = 0.0098061224
Boson Index = 0.9901938776

Photoelectric:

PE_{Zincovoltaite}= 11.50 barns/electron
U=PE_{Zincovoltaite} x r_electron= 31.59 barns/cc.

Radioactivity:

GRapi = 54.16 (Gamma Ray American Petroleum Institute Units)
Concentration of Zincovoltaite per GRapi unit = 1.85 (%)

Estimated Radioactivity from Zincovoltaite - barely detectable

Zincovoltaite Classification

Dana Class:

29.09.01.02 (29)Hydrated Acid and Sulfates

(29.09)with miscellaneous formulae

(29.09.01)Voltaite Group

29.09.01.01 Voltaite K2Fe5Fe3Al(SO4)12•18(H2O) F d3c 4/m 3 2/m

29.09.01.02 Zincovoltaite K2Zn5Fe3Al(SO4)12•18(H2O) F d3c 4/m 3 2/m

29.09.01.03 Pertlikite! K2(Fe,Mg)2(Mg,Fe)4Fe2Al(SO4)12•18H2O I 4₁/acd 4/m 2/m 2/m

Strunz Class:

07.CC.25 07 - SULFATES (SELENATES, TELLURATES)

07.C - Sulfates (selenates, etc.) without Additional Anions, with H2O

07.CC -With medium-sized and large cations

07.CC.25 Monsmedite? H8K2Tl2(SO4)8•11(H2O) F d3c 4/m 3 2/m

07.CC.25 Voltaite K2Fe5Fe3Al(SO4)12•18(H2O) F d3c 4/m 3 2/m

07.CC.25 Zincovoltaite K2Zn5Fe3Al(SO4)12•18(H2O) F d3c 4/m 3 2/m

07.CC.25 Pertlikite! K2(Fe,Mg)2(Mg,Fe)4Fe2Al(SO4)12•18H2O I 4₁/acd 4/m 2/m 2/m

Other Zincovoltaite Information

References:

NAME( AntBidBlaNic5) PHYS. PROP.(Am.Min.,Vol.75,p244,1990) OPTIC PROP.(Am.Min.,Vol.75,p244,1990)

See Also:

Links to other databases for Zincovoltaite :
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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Print or Cut-and-Paste your Zincovoltaite Specimen Label here :

Zincovoltaite

K2Zn5Fe+++3Al(SO4)12•18(H2O)
Dana No: 29.09.01.02 Strunz No: 07.CC.25
Locality:

Notes:

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