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New data on ktenasite

Published online by Cambridge University Press:  05 July 2018

G. Raade ,
C. J. Elliott  and
E. E. Fejer
G. Raade
Affiliation:
Institutt for geologi, Universitetet i Oslo, P.O. Box 1047, Blindern, Oslo 3, Norway
C. J. Elliott
Affiliation:
Department of Mineralogy, British Museum (Natural History), Cromwell Road, London SW7 5BD, England
E. E. Fejer
Affiliation:
Department of Mineralogy, British Museum (Natural History), Cromwell Road, London SW7 5BD, England
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Summary

Ktenasite from Glomsrudkollen zinc mine, Modum, Norway, is menoclinic, space group P21/c. The cell dimensions are a 5·598, b 6·121, c 23·762Å, β 95·55° The chemical formula is (Cu3·5Zn1·5)(SO4)2 (OH)6·6H2O with Z = 2; ρcale 2·96 g/cm3, ρobs 2·94 g/cm3. The mineral is biaxial negative with α (colourless) 1·574, β (bluish green) 1·615, γ (light green) 1·628, 2Vα 59°.

Type
Research Article
Information
Mineralogical Magazine , Volume 41 , Issue 317 , March 1977 , pp. 65 - 70
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1977

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References

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