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An occurrence of phlogopite and its transformation to vermiculite by weathering

Published online by Cambridge University Press:  14 March 2018

W. W. Smith Aitken
W. W. Smith Aitken*
Affiliation:
The Macaulay Institute for Soil Research, Aberdeen, Scotland
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Summary

The characteristics of a phlogopite and its weathering product, vermiculite, have been studied by X-ray, infra-red, electron-microscope, and chemical methods. Inclusions within these minerals have been identified as thin films rich in iron oxide (which impart a schiller effect), spinel (which may exist in a preferred orientation), and serpentine. The orientation relationship between the fresh mica and its weathering product has been established by single-crystal methods. The mechanism of transformation from a 1-layer to a 2-layer polytype is discussed.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 35 , Issue 269 , March 1965 , pp. 151 - 164
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1965

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