gsminmag Mineralogical Magazine Mineralogical Magazine 0026-461X Mineralogical Society 10.1180/minmag.1977.041.320.02 Claringbullite, a New Hydrated Copper Chloride Fejer E. E. Clark A. M. Couper A. G. Elliott C. J. Department of Mineralogy, British Museum (Natural History), Cromwell Road, London SW7 5BD 12 1977 41 320 433 436 11 11 1976 Copyright © 1977, The Mineralogical Society 1977 Summary

Claringbullite, Cu4CI(OH)7.nH2O where n is about 0·5, a new mineral, is reported as soft blue plates in cuprite from Nchanga open pit, Zambia and Kambowe, Mina M'sesa, Katanga. The mineral is hexagonal a 6-6708, c 9·183 Å, Z = 2. Optically, claringbullite is uniaxial negative with ω = 1·782 and ε = 1·780. Indexed powder data are given together with five electron-probe analyses of the mineral.