The Crystal Structure of Kamchatkite, a New Naturally Occurring Oxychloride Sulphate of Potassium and Copper

T. V. Varaksina, V. S. Fundamensky, S.K. Filatov and L. P. Vergasova
Department of Crystallography, Leningrad State University, USSR,
Institute of Volcanology, Academy of Sciences of the USSR, Petropavlovsk-Kamchatsky

Abstract: The crystal structure of the new mineral kamchatkite, a= 9.741(5), b= 12.858(6), c=7.001(3)Å, space group Pna21, Z = 4, has been determined through direct methods using 1430 intensities and refined to a final discrepancy index R = 0.055. It contains (SO4) tetrahedra and Cu octahedra interconnected by oxygen atoms to form an electrostatically neutral three-dimensional arrangement of formula Cu3O[SO4]2 which contains channels parallel to [001]. The channels are not empty but house KCl molecules.

Keywords: kamchatkite • crystal structure • Kamchatka • USSR

Mineralogical Magazine; December 1990 v. 54; no. 377; p. 613-616; DOI: 10.1180/minmag.1990.054.377.14
© 1990, The Mineralogical Society
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