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Hydroxyl Stretching Bands in Micas: A Quantitative Interpretation

Published online by Cambridge University Press:  09 July 2018

Paul G. Rouxhet*
Affiliation:
Laboratoire de Physico-Chimie Minérale, de Craylaan 42, 3030 Heverlee, Belgium
*
Chargé de recherches-Fonds National de la Recherche Scientifique

Abstract

Methods are described for estimating a valuable absorption coefficient for OH stretching bands of micas: the integrated parallel absorption coefficient K.

From a correlation between this coefficient and the OH content of biotites and phlogopites, it was found that the parallel absorption coefficient per hydroxyl group in these trioctahedral micas is not appreciably influenced by the chemical composition and the direction of the OH bond. A clear deviation was observed for the low frequency band of a biotite characterized by a well-ordered orientation distribution for the corresponding hydroxyl groups.

The integrated parallel absorption coefficient of muscovite is proportionally 2·5 to 3 times larger than that of trioctahedral micas.

Information

Type
Research Article
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1970

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