gsminmag Mineralogical Magazine Mineralogical Magazine 0026-461X Mineralogical Society 10.1180/minmag.1991.055.379.03 Mineralogy and Geochemistry The Synthesis and Composition of Georgeite and Its Reactions to form Other Secondary Copper(II) Carbonates Pollard A. M. Thomas R. G. Williams P. A. School of Chemistry and Applied Chemistry, University of Wales College of Cardiff, P.O. Box 912, Cardiff CF1 3TB Just J. 30 Kay Street, Scarborough, W.A. 6019, Australia Bridge P. J. 61 Washington Street, Victoria Park, W.A. 6100, Australia W.A. 6000, Australia 6 1991 55 379 163 166 22 5 1989 17 8 1990 Copyright © 1991, The Mineralogical Society 1991 Abstract

Comparison of the infrared spectra of georgeite and a phase which can be reproducibily synthesised in the laboratory shows that the mineral is an amorphous analogue of malachite, Cu2CO3(OH)2. Synthetic studies also explain the chemical conditions under which georgeite may form, as well as those which can cause it to react to either malachite or chalconatronite. Parallels may be drawn between the laboratory observations and known mineral associations of georgeite.

 Keywords georgeite synthesis copper carbonates infrared spectra