gsminmag Mineralogical Magazine Mineralogical Magazine 0026-461X Mineralogical Society 10.1180/minmag.1994.58A.2.251 Applications of ab initio Quantum Mechanical Potential Surfaces to Mineral Physics Calculations Xiao Y. Lasaga A. C. Department of Geology and Geophysics, Yale University, P. O. Box 6666, New Haven, CT 06511, USA August–September 1994 58A 2 992 993 Copyright © 1994, The Mineralogical Society 1994