Hydroxyl Stretching Bands in Micas: A Quantitative Interpretation
- 1 December 1970
- journal article
- Published by Mineralogical Society in Clay Minerals
- Vol. 8 (4) , 375-388
- https://doi.org/10.1180/claymin.1970.008.4.02
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.Keywords
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