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Birnessite, a new manganese oxide mineral from Aberdeenshire, Scotland

Published online by Cambridge University Press:  14 March 2018

L. H. P. Jones  and
Angela A. Milne
L. H. P. Jones
Affiliation:
Commonwealth Scientific and Industrial Research Organization
Angela A. Milne
Affiliation:
Commonwealth Scientific and Industrial Research Organization
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Summary

A manganese pan near Birness contains grains of an optically uniaxial negative mineral near (Na0·7Ca0·3)Mn7O14·2·8H2O, giving an X-ray powder pattern similar to that of synthetic materials described as ‘manganous manganite’ and δ-MnO2. Material giving a similar pattern has been described from a natural occurrence in Canada, but no mineral name was assigned; the name birnessite is now proposed. The mineral is probably formed by air-oxidation of manganous oxides under alkaline conditions.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 31 , Issue 235 , December 1956 , pp. 283 - 288
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1956

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