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Genthelvite and the helvine group

Published online by Cambridge University Press:  05 July 2018

Pete J. Dunn
Pete J. Dunn*
Affiliation:
Dept. of Mineral Sciences, Smithsonian Institution, Washington, D.C. 20560, U.S.A.
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Summary

A plot of seventy-five new analyses of members of the helvine group and fifty-seven analyses from the literature indicates complete miscibility between the Fe and Zn members (danalite and helvine) and between the Fe and Mn members (danalite and genthelvite). The new analyses include essentially pure helvine and genthelvite (for both of which X-ray data are presented) and the nearest approach to pure danalite (86 at. % Fe). Two new localities for genthelvite, the rarest member, are reported.

Type
Research Article
Information
Mineralogical Magazine , Volume 40 , Issue 314 , June 1976 , pp. 627 - 636
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1976

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