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Reichenbachite from Cornwall and Portugal

Published online by Cambridge University Press:  05 July 2018

R. S. W. Braithwaite  and
G. Ryback
R. S. W. Braithwaite
Affiliation:
Chemistry Department, University of Manchester Institute of Science and Technology, Manchester, M60 1QD, UK
G. Ryback
Affiliation:
42, Bell Road, Sittingbourne, Kent, ME10 4EB, UK
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Abstract

Infrared spectroscopy is a rapid method of distinguishing between pseudomalachite and its polymorphs reichenbachite and ludjibaite. This technique, backed by X-ray diffraction has shown that a number of specimens labelled ‘pseudomalachite’ from Cornwall, in particular from Old Gunnislake mine, are of reichenbachite, thus identified for the first time from the British Isles. Reichenbachite has also been identified with pseudomalachite from Miguel Vacas mine, Vila Viçosa, Evora, Portugal. Identification of pseudomalachite from a number of other localities world-wide has been confirmed, and some specimens have been shown to be arsenatian.

Keywords

reichenbachitepseudomalachiteludjibaiteinfrared spectroscopyCornwallPortugal
Type
Mineralogy
Information
Mineralogical Magazine , Volume 58 , Issue 392 , September 1994 , pp. 449 - 454
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1994

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