Kapellasite Mineral Data
General Kapellasite Information
Chemical Formula:
Cu3Zn(OH)6Cl2
Composition:
Molecular Weight = 428.99 gm
Zinc 11.43 % Zn 14.23 % ZnO
Copper 47.99 % Cu 60.08 % CuO
Hydrogen 1.40 % H 12.47 % H2 O
Chlorine 17.02 % Cl 17.02 % Cl
- %
Cl -3.84 % -O=Cl2
Oxygen 22.15 % O
______ ______
100.00 % 99.96 % = TOTAL OXIDE
Empirical Formula:
Cu3.24 Zn0.75 (OH)5.94 Cl2.06
Environment:
Metastable polymorph of herbertsmithite.
IMA Status:
Approved IMA 2005 (Dana # Added)
Locality:
Sounion mine #19, Lavrion, Attica, Greece Link to MinDat.org Location Data.
Name Origin:
Named for Christo Kapellas (1938-2004), collector and mineral dealer from Kamariza, Lavrion, Greece.
Synonym:
IMA2005-009
Kapellasite Crystallography
Axial Ratios:
a:c = 1:0.90999
Cell Dimensions:
a = 6.3, c = 5.733, Z = 1; V = 197.06 Den(Calc)= 3.61
Crystal System:
Trigonal - Hexagonal Scalenohedral H-M Symbol (3 2/m) Space Group: P 3 m1
X Ray Diffraction:
By Intensity(I/Io ): 5.73(1), 2.464(0.81), 2.73(0.39), 1.976(0.32), 1.576(0.17), 2.761(0.12), 2.865(0.11), 1.519(0.1),
Physical Properties of Kapellasite
Cleavage:
{hk0} Good
Color:
Bluish green.
Density:
3.55
Diaphaneity:
Transparent
Fracture:
Brittle - Generally displayed by glasses and most non-metallic minerals.
Habit:
Encrustations - Forms crust-like aggregates on matrix.
Luster:
Vitreous (Glassy)
Streak:
ligth blue-green
Optical Properties of Kapellasite
Gladstone-Dale:
CI meas = 0.005 (Superior) - where the CI = (1-KPDmeas /KC ) CI calc = 0.022 (Excellent) - where the CI = (1-KPDcalc /KC )
KPDcalc = 0.2161,KPDmeas = 0.2197,KC = 0.2208 Ncalc = 1.78 - 1.8
Optical Data:
Uniaxial (-), e=1.76, w=1.8, bire=0.0400.
Calculated Properties of Kapellasite
Electron Density:
Bulk Density (Electron Density)=3.39 gm/cc note: Specific Gravity of Kapellasite =3.55 gm/cc.
Fermion Index:
Fermion Index = 0.0047956108 Boson Index = 0.9952043892
Photoelectric:
PEKapellasite = 28.04 barns/electronU=PEKapellasite x r Electron Density= 95.10 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Kapellasite is Not Radioactive
Kapellasite Classification
Dana Class:
10.01.02.04 (10) Oxyhalides and Hydroxyhalides
(10.01) where (A)2 (O,OH)3 Xq
(10.01.02) Paratacamite Group
10.01.02.01 Paratacamite (Cu,Zn)2(OH)3Cl R 3 3
10.01.02.02 Clinoatacamite ! Cu2(OH)3Cl P 21 /n 2/m
10.01.02.03 Herbertsmithite ! Cu3Zn(OH)6Cl2 R 3 m 3 2/m
10.01.02.04 Kapellasite ! Cu3Zn(OH)6Cl2 P 3 m1 3 2/m
Strunz Class:
03.DA.10c 03 - HALIDES
03.D - Oxyhalides, Hydroxyhalides and Related Double Halides
03.DA -With Cu, etc., without Pb
03.DA.10c Paratacamite (Cu,Zn)2(OH)3Cl R 3 3
03.DA.10c Gillardite ! Cu3NiCl2(OH)6 R 3 m 3
03.DA.10c Herbertsmithite ! Cu3Zn(OH)6Cl2 R 3 m 3 2/m
03.DA.10c Kapellasite ! Cu3Zn(OH)6Cl2 P 3 m1 3 2/m
03.DA.10c Haydeeite ! Cu3Mg(OH)6Cl2 R 3 m 3
Other Kapellasite Information
References:
NAME( MinMag, v70:329) PHYS. PROP.(MinMag, v70:329) OPTIC PROP.(MinMag, v70:329)
See Also:
Links to other databases for Kapellasite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info
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Print or Cut-and-Paste your Kapellasite Specimen Label here :
Kapellasite
Cu3Zn(OH)6Cl2
Dana No: 10.01.02.04 Strunz No: 03.DA.10c
Locality:
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