Why does halloysite roll? - A new model

被引：163
作者：
Singh, B
机构：
[1] Ctr. for Microsc. and Microanalysis, University of Queensland, Brisbane
来源：
CLAYS AND CLAY MINERALS | 1996年 / 44卷 / 02期
关键词：
coulomb repulsion; kaolinite; rolling; tetrahedral rotation; tubular halloysite;
D O I：
10.1346/CCMN.1996.0440204
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
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.
引用
收藏
页码：191 / 196
页数：6
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