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The infra-red spectra of talc, saponite, and hectorite

Published online by Cambridge University Press:  14 March 2018

V. C. Farmer
V. C. Farmer*
Affiliation:
The Macaulay Institute for Soil Research, Aberdeen, Scotland
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Summary

The absorption spectra of talc, saponite, and hectorite between 4000 and 400 cm. −1 are closely related, although the bands of the smectites are more diffuse as a result of isomorphous substitutions in the tale structure. Using oriented specimens, vibrations in which the change of dipole moment is perpendicular to the sheets of the minerals are identified, and the results compared with theoretical predictions. Three bands arising from the stretching vibrations of interlayer water molecules in the smectites are distinguished, one of which corresponds to a very weak hydrogen bond. Spectral changes arising from vigorous grinding are discussed.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 31 , Issue 241 , June 1958 , pp. 829 - 845
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1958

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