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On the new mineral theophrastite, a nickel hydroxide, from Unst, Shetland, Scotland

Published online by Cambridge University Press:  05 July 2018

A. Livingstone  and
D. L. Bish
A. Livingstone
Affiliation:
Department of Geology, Royal Scottish Museum, Chambers Street, Edinburgh, Scotland
D. L. Bish
Affiliation:
Los Alamos Scientific Laboratory, PO Box 1663, Mail Stop 978, Los Alamos, New Mexico, USA
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Abstract

The new mineral theophrastite, Ni(OH)2, from Unst, is Mg-bearing and occurs associated with a very poorly crystalline Ni-containing mixed hydroxide of the pyroaurite type and/or zaratite on chromitite. X-ray powder diffraction data show a shift in d spacing toward brucite compared with pure Ni(OH)2. Infrared, thermal, chemical, optical, and physical data are presented together with indexed powder data for fifteen lines ranging from d 4.66Å to 0.90Å. The solid-solution series brucite-theophrastite is briefly discussed.

Type
Research Article
Information
Mineralogical Magazine , Volume 46 , Issue 338 , March 1982 , pp. 1 - 5
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1982

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