gsminmag Mineralogical Magazine Mineralogical Magazine 0026-461X Mineralogical Society 10.1180/minmag.1998.62A.2.01 Studying in Situ Hydrothermal Reactions with X-ray Absorption Spectroscopy Hoffmann M. M. Darab J. G. Fulton J. L. Pacific Northwest National Laboratory, Battelle Boulevard, P.O.Box 999 MS P8-19, Richland, Washington 99352, USA Stern E. A. University of Washington, Department of Physics, Box 351560, Seattle, Washington 98195, USA 1998 62A 2 636 637 Copyright © 1998, The Mineralogical Society 1998