gsminmag Mineralogical Magazine Mineralogical Magazine 0026-461X Mineralogical Society 10.1180/minmag.1989.053.370.05 Studies of the Orthoamphiboles. IV. Mössbauer Spectra of Anthophyllites and Gedrites Law Anthony D. * Department of Earth Sciences, University of Oxford, Parks Road, Oxford OX13PR

Present address: BP Exploration Company Ltd., Britannic House, Moor Lane, London EC2Y 9BU.

 4 1989 53 370 181 191 12 4 1988 15 11 1988 Copyright © 1989, The Mineralogical Society 1989 Abstract

Fitted Mössbauer spectra are presented for a set of anthophyllites and gedrites. Despite their complexity it is possible to obtain fits for gedrite spectra and the Mössbauer parameters are consistent with results for anthophyllites from this and previous studies. At least three doublets are required to fit the Fe2+ absorption in gedrites; there is no single model at present to explain the behaviour of the spectra. Fe3+ absorption is also resolved.

 Keywords orthoamphiboles Mössbauer spectra anthophyllites gedrites