gsminmag Mineralogical Magazine Mineralogical Magazine 0026-461X Mineralogical Society 10.1180/minmag.1998.62A.2.214 Analysis of Gold Speciation in Hydrothermal Fluids by Raman Spectroscopy: The Example of Gold Chloride Solutions Murphy P. J. Raman and Luminescence Laboratory, Department of Physics, University of the Witwatersrand, Johannesburg, WITS 2050, South Africa LaGrange M. S. Stevens G. Economic Geology Research Unit, University of the Witwatersrand, Johannesburg, WITS 2050, South Africa 1998 62A 2 1046 1047 Copyright © 1998, The Mineralogical Society 1998