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Manganoan Ilvaite from Broken Hill, N.S.W. and Ban Ban, Queensland, Australia

Published online by Cambridge University Press:  05 July 2018

I. R. Plimer  and
P. M. Ashley
I. R. Plimer
Affiliation:
University of New South Wales, P.O. Box 334, Broken Hill, N.S.W. 2880
P. M. Ashley
Affiliation:
Minerals Department, Esso Australia Ltd., G.P.O. Box 4047, Sydney, N.S.W. 2001
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Summary

Manganoan ilvaite forms as an early retrograde metamorphic phase from calcic rhodonite in the polymetamorphosed Pb-Zn sulphide/manganese silicate rocks at Broken Hill and from grossular-andradite in a skarn at Ban Ban. Ilvaite exists as a probable metastable phase into which Mn is apparently strongly partitioned. The manganoan ilvaites analysed contain up to 13·5 % MnO substituting for FeO and this substitution shifts the 020 peak.

Type
Research Article
Information
Mineralogical Magazine , Volume 42 , Issue 321 , March 1978 , pp. 85 - 88
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1978

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