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Axinites from the contact skarns of the Meldon aplite, Devonshire, England

Published online by Cambridge University Press:  05 July 2018

M. Nawaz Chaudhry  and
R. A. Howie
M. Nawaz Chaudhry
Affiliation:
Department of Geology, University of the Panjab, Lahore, West Pakistan
R. A. Howie
Affiliation:
Department of Geology, King's College, London, W.C. 2
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Summary

Chemical analyses, optical properties, and specific gravities are presented for nine axinites. A reciprocal substitution relationship is demonstrated between Mg and Mn2+, and a linear variation diagram is constructed between refractive indices and the (Fe2++Fe3++Mn2++Ti) ions calculated on the basis of 16(O,OH). The composition of these axinites is independent of the composition of their host rocks; their colour appears to be independent of the Fe2+/Mn2+ ratio for the range of iron and manganese values of the specimens investigated.

Type
Research Article
Information
Mineralogical Magazine , Volume 37 , Issue 285 , March 1969 , pp. 45 - 48
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1969

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