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Differentiation between Endellite-Halloysite and Kaolinite by Treatment with Potassium Acetate and Ethylene Glycol

Published online by Cambridge University Press:  01 January 2024

W. D. Miller  and
W. D. Keller
W. D. Miller
Affiliation:
Department of Geology, University of Missouri, Columbia, Missouri, USA
W. D. Keller
Affiliation:
Department of Geology, University of Missouri, Columbia, Missouri, USA
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Abstract

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Halloysite and endellite yield 10 Å basal spacings after grinding with potassium acetate (using a modification of Wada’s procedure) and washing with water and ethylene glycol, whereas the basal spacing of kaolinite, similarly treated, remains at 7 Å. The technique applies satisfactorily to sedimentary and hydrothermal halloysites, various commercial kaolins, ball clays, flint and plastic fire clays, and artificially prepared mixtures of halloysite and kaolinite. Similar responses to the treatment by both laboratory-dehydrated endellite (thereby collapsed to 7 Å) and naturally occurring halloysite add support to the concept that endellite is a progenitor of halloysite.

Type
Symposium on Clay-Organic Complexes
Information
Clays and Clay Minerals (National Conference on Clays and Clay Minerals) , Volume 10 , February 1961 , pp. 244 - 253
Copyright
Copyright © Clay Minerals Society 1961

References

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