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The synthesis of birnessite, cryptomelane, and some other oxides and hydroxides of manganese

Published online by Cambridge University Press:  05 July 2018

R. M. McKenzie
R. M. McKenzie*
Affiliation:
C.S.I.R.O., Division of Soils, Glen Osmond, South Australia, 5064
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Summary

Detailed methods are described for the laboratory preparation of the manganese minerals manganosite, hausmannite, manganite, partridgeite, birnessite, cryptomelane, pyrolusite, and todorokite. New data are presented on the conversion of birnessite to cryptomelane, and on the exchange properties of potassium in these two minerals. It was found that the upper limit of potassium in cryptomelane is about 7 % K, while the lower limit lies between 0·25 % and 2·2 % K.

Type
Research Article
Information
Mineralogical Magazine , Volume 38 , Issue 296 , December 1971 , pp. 493 - 502
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1971

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