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Bravoite from Mill Close mine, Derbyshire

Published online by Cambridge University Press:  14 March 2018

F. A Bannister  and
M. H. Hey
F. A Bannister
Affiliation:
Mineral Department, British Museum
M. H. Hey
Affiliation:
Mineral Department, British Museum
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Extract

Early this year Mr. Arthur Russell brought me a small specimen of ore from Mill Close mine, Wensley, Derbyshire, for identification. An X-ray powder photograph p1. xxviii, fig. 3, showed that the mineral has the pyrite structure with unit-cell edge a 5.49 Å., and a chemical analysis of a small sample of specific gravity 4·82, yielded Ni 16·69, Fe 29·30, S 53.40% (see table 1). These data identified the specimen as bravoite, a rare mineral new to the British Isles. At a later date Professor W. G. Fearnsides interested himself in our preliminary work and kindly provided me with further specimens of bravoite and accessory minerals from the Mill Close mine. These also have been investigated.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 25 , Issue 170 , September 1940 , pp. 609 - 614
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1940

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References

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