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Pressure-induced cation exchange in bentonite/laponite mixtures

Published online by Cambridge University Press:  09 July 2018

E. Paterson  and
D. R. Clark
E. Paterson
Affiliation:
Macaulay Land Use Research Institute, Craigiebuckler, Aberdeen AB9 2QJ, UK
D. R. Clark
Affiliation:
Macaulay Land Use Research Institute, Craigiebuckler, Aberdeen AB9 2QJ, UK
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Abstract

Exchangeable cation associations in physical mixtures of bentonite and laponite have been examined using X-ray diffraction and a combination of electron microprobe analysis and multivariate statistical methods. The results suggest that cation exchange can occur in air-dry mixtures when pressure (∼64 kbar) is applied. Although no attempt is made to describe the mechanism of the reaction it appears to require the presence of adsorbed water.

Type
Research Article
Information
Clay Minerals , Volume 26 , Issue 3 , September 1991 , pp. 371 - 375
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1991

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References

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