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Why Does Halloysite Roll?—A New Model

Published online by Cambridge University Press:  28 February 2024

Balbir Singh
Balbir Singh*
Affiliation:
Centre for Microscopy and Microanalysis, The University of Queensland Brisbane, Qld. 4072, Australia
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Abstract

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A model is presented to explain why tubular halloysite rolls in preference to tetrahedral rotation to correct misfit of the octahedral and tetrahedral sheets. It is shown that the rolling mechanism operates as it encounters significantly less resistance from Si-Si repulsion in comparison to tetrahedral rotation to correct the same amount of misfit. The model explains the observed and experimental rolling of planar kaolinites to form tubular halloysite upon hydration and exfoliation.

Keywords

Coulomb repulsionKaoliniteRollingTetrahedral rotationTubular Halloysite
Type
Research Article
Information
Clays and Clay Minerals , Volume 44 , Issue 2 , April 1996 , pp. 191 - 196
Copyright
Copyright © 1996, The Clay Minerals Society

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