gsminmag Mineralogical Magazine Mineralogical Magazine 0026-461X Mineralogical Society 10.1180/minmag.1998.62A.1.87 Enzyme-Catalyzed Oxygen Isotope Exchange between Inorganic Phosphate and Water: Reaction Rates and Temperature Dependence at 5.7–30°C Blake R. E. O'Neil J. R. Department of Geological Sciences, University of Michigan, Ann Arbor, MI 48109, USA Garcia G. A. Interdepartmental Program in Medicinal Chemistry, College of Pharmacy, University of Michigan, Ann Arbor, MI 48109, USA 1998 62A 1 163 164 Copyright © 1998, The Mineralogical Society 1998