Zincroselite Mineral Data
General Zincroselite Information
Chemical Formula:
Ca2Zn(AsO4)2•2(H2O)
Composition:
Molecular Weight = 459.41 gm
Calcium 17.45 % Ca 24.41 % CaO
Zinc 14.23 % Zn 17.72 % ZnO
Arsenic 32.62 % As 50.03 % As2 O5
Hydrogen 0.88 % H 7.84 % H2 O
Oxygen 34.83 % O
______ ______
100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula:
Ca2 Zn(AsO4 )2 •2(H2 O)
Environment:
Tsumeb, Namibia.
IMA Status:
Approved IMA 1986
Locality:
Secondary mineral in an oxidized zone of a dolostone-hosted hydrothermal polymetallic ore deposit. Link to MinDat.org Location Data.
Name Origin:
Named for its content of zinc and relation to roselite.
Name Pronunciation:
Zincroselite + Pronunciation
Zincroselite Crystallography
Axial Ratios:
a:b:c =0.4524:1:0.4378
Cell Dimensions:
a = 5.832, b = 12.889, c = 5.644, Z = 2; beta = 107.72° V = 404.12 Den(Calc)= 3.78
Crystal System:
Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21 /c
X Ray Diffraction:
By Intensity(I/Io ): 3(1), 3.22(0.8), 5.1(0.6),
Physical Properties of Zincroselite
Cleavage:
{???} Good
Color:
Colorless, White.
Density:
3.75
Diaphaneity:
Transparent
Hardness:
3 - Calcite
Streak:
white
Optical Properties of Zincroselite
Gladstone-Dale:
CI meas = -0.014 (Superior) - where the CI = (1-KPDmeas /KC ) CI calc = -0.006 (Superior) - where the CI = (1-KPDcalc /KC )
KPDcalc = 0.1881,KPDmeas = 0.1896,KC = 0.187 Ncalc = 1.7 - 1.71
Optical Data:
Biaxial (+), a=1.703, b=1.71, g=1.72, bire=0.0170, 2V(Calc)=82, 2V(Meas)=50-57.
Calculated Properties of Zincroselite
Electron Density:
Bulk Density (Electron Density)=3.62 gm/cc note: Specific Gravity of Zincroselite =3.78 gm/cc.
Fermion Index:
Fermion Index = 0.0062396803 Boson Index = 0.9937603197
Photoelectric:
PEZincroselite = 31.40 barns/electronU=PEZincroselite x r Electron Density= 113.69 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Zincroselite is Not Radioactive
Zincroselite Classification
Dana Class:
40.02.03.03 (40) Hydrated Phosphates, etc
(40.02) where A++ (B++)2 (XO4) � x(H2O)
(40.02.03) Roselite Subgroup (Monoclinic: P21/c)
40.02.03.01 Roselite Ca2(Co,Mg)(AsO4)2•2(H2O) P 21 /c 2/m
40.02.03.02 Brandtite Ca2(Mn,Mg)(AsO4)2•2(H2O) P 21 /c 2/m
40.02.03.03 Zincroselite Ca2Zn(AsO4)2•2(H2O) P 21 /c 2/m
40.02.03.04 Wendwilsonite Ca2(Mg,Co)(AsO4)2•2(H2O) P 21 /c 2/m
40.02.03.05 Manganlotharmeyerite ! Ca(Mn,Mg,)2(AsO4)2(OH,H2O)2 C 2/m 2/m
Strunz Class:
08.CG.10 08 - PHOSPHATES, ARSENATES, VANADATES
08.C - Phosphates without Additional Anions, with H2O
08.CG -With large and medium-sized cations, RO4:H2O = 1:1
08.CG.10 Brandtite Ca2(Mn,Mg)(AsO4)2•2(H2O) P 21 /c 2/m
08.CG.10 Roselite Ca2(Co,Mg)(AsO4)2•2(H2O) P 21 /c 2/m
08.CG.10 Roselite-beta Ca2(Co,Mg)(AsO4)2•2(H2O) P 1 or P1 Tri
08.CG.10 Zincroselite Ca2Zn(AsO4)2•2(H2O) P 21 /c 2/m
08.CG.10 Wendwilsonite Ca2(Mg,Co)(AsO4)2•2(H2O) P 21 /c 2/m
Other Zincroselite Information
References:
NAME( AntBidBlaNic4) PHYS. PROP.(Am.Min.,Vol.73,p932,1988) OPTIC PROP.(Am.Min.,Vol.73,p932,1988)
See Also:
Links to other databases for Zincroselite :
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 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info
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Print or Cut-and-Paste your Zincroselite Specimen Label here :
Zincroselite
Ca2Zn(AsO4)2•2(H2O)
Dana No: 40.02.03.03 Strunz No: 08.CG.10
Locality:
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