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New Approach to the Problem of the Interlayer Bonding in Kaolinite

Published online by Cambridge University Press:  01 July 2024

Tadeusz Więckowski
Affiliation:
The Crystallography Laboratory, Institute of Fundamental Problems of Chemistry, The Warsaw University, Poland
Andrzej Wiewióra
Affiliation:
The Crystallography Laboratory, Institute of Fundamental Problems of Chemistry, The Warsaw University, Poland

Abstract

The possibility of recording the absorption band which is related to oscillations of free OH in a superficial plane of the octahedral sheet of kaolinite inspired the present authors to review the problem of cohesion forces in kaolinite. Structural and spectroscopic criteria as applied to kaolinite proved that the cohesion of adjacent kaolinite layers may be estimated in terms of bent hydrogen bonds. Energy calculations were performed with the aid of a Lennard-Jones function using a modified linear model of the hydrogen bonds. The entire energy is composed of four terms described by the general potential function, van der Waals repulsion and an electrostatic attraction. The energy values of the individual terms are within the limits characteristic of each of them.

Type
Research Article
Copyright
Copyright © 1976 The Clay Minerals Society

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