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 % H₂O

Chlorine 17.02 % Cl 17.02 % Cl

- % Cl -3.84 % -O=Cl₂

Oxygen 22.15 % O

______ ______

100.00 % 99.96 % = TOTAL OXIDE

Empirical Formula:

Cu_3.24Zn_0.75(OH)_5.94Cl_2.06

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 3m1

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

By Intensity(I/I_o): 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:

PE_Kapellasite= 28.04 barns/electron
U=PE_Kapellasite x rElectron 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 3m 3 2/m

10.01.02.04 Kapellasite! Cu3Zn(OH)6Cl2 P 3m1 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 3m 3

03.DA.10c Herbertsmithite! Cu3Zn(OH)6Cl2 R 3m 3 2/m

03.DA.10c Kapellasite! Cu3Zn(OH)6Cl2 P 3m1 3 2/m

03.DA.10c Haydeeite! Cu3Mg(OH)6Cl2 R 3m 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:

Notes:

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