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‘Plumbogummite’ from Roughten Gill Cumberland

Published online by Cambridge University Press:  14 March 2018

E. B. Förtsch
E. B. Förtsch*
Affiliation:
Department of Geology, University of Pretoria, R.S.A.
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Summary

X-ray, infra-red, and optical studies suggest that the bluish-grey crust (previously described as plumbogummite) on arsenian pyromorphite from Roughten Gill, Cumberland, is a carbonate-bearing mix-crystal of plumbogummite, hinsdalite, and hidalgoite with a 7·018 Å, c 16·784 Å; arh 6·907, a 61° 3′; ω 1·680, ɛ 1·698.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 36 , Issue 280 , December 1967 , pp. 530 - 538
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1967

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