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Dehydration of Fully Hydrated Halloysite from Lawrence County, Indiana

Published online by Cambridge University Press:  01 January 2024

Jack L. Harrison  and
Seymour S. Greenberg
Jack L. Harrison
Affiliation:
Indiana Geological Survey, Bloomington, Indiana, USA
Seymour S. Greenberg
Affiliation:
Indiana Geological Survey, Bloomington, Indiana, USA
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Abstract

The changes occurring in fully hydrated halloysite during dehydration have been studied by X-ray diffraction at relative humidities that ranged from 0 to 100 percent. From the results of this study it has been concluded that: (1) layers dehydrate randomly, but instantaneously; (2) the diffraction from an individual crystallite is governed by the ratio of hydrated to dehydrated layers present; and (3) halloysite dehydrated to any degree shows no detectable rehydration when exposed to 100 percent relative humidity for 2 months.

Type
General Session
Information
Clays and Clay Minerals (National Conference on Clays and Clay Minerals) , Volume 9 , February 1960 , pp. 374 - 377
Copyright
Copyright © The Clay Minerals Society 1960

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Footnotes

Published with permission of the State Geologist, Indiana Department of Conservation, Geological Survey.

References

American Petroleum Institute (1949) Reference Clay Minerals: Research Project 49, New York.Google Scholar
Brindley, G. W. and Goodyear, J. (1948) X-ray studies of halloysite and metahalloysite, II. The transition of halloysite to metahalloysite in relation to relative humidity: Min. Mag., v. 28, pp. 407–422.Google Scholar