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Kinetics and Mechanisms of Dehydration and Recrystallization of Serpentine—I

Published online by Cambridge University Press:  01 January 2024

G. W. Brindley  and
Ryozo Hayami
G. W. Brindley
Affiliation:
The Pennsylvania State University, University Park, Pennsylvania, USA
Ryozo Hayami
Affiliation:
The Pennsylvania State University, University Park, Pennsylvania, USA
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Abstract

Dehydration and recrystallization reactions of fine and coarse powders and also of massive samples of serpentine under isothermal heating conditions in air are followed by thermobalance measurements and by X-ray diffraction intensities. The rate of recrystallization to forsterite is shown to have an inverse relationship to the rate of dehydration. This result is interpreted in terms of the damage inflicted on the crystal structure of serpentine by the dehydration reaction; the more slowly this reaction occurs, the more readily is forsterite formed as a result of the topotactic relationship between forsterite and serpentine. The surface layers of particles and massive samples of serpentine which dehydrate readily appear to be highly disordered and consequently recrystallize to forsterite very slowly. The corresponding phenomena exhibited by kaolinite are discussed and compared with those by serpentine.

Type
Symposium on High Temperature Transformations
Information
Clays and Clay Minerals (National Conference on Clays and Clay Minerals) , Volume 12 , February 1963 , pp. 35 - 47
Copyright
Copyright © The Clay Minerals Society 1963

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Footnotes

Contribution No. 63-48, College of Mineral Industries, The Pennsylvania State University, University Park, Pennsylvania.

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The following reference is also relevant to the subject:

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