DEHYDRATION OF SYNTHETIC HYDRATED KAOLINITES - A MODEL FOR THE DEHYDRATION OF HALLOYSITE(10A)

被引：56

作者：

COSTANZO, PM

GIESE, RF

机构：

[1] State Univ of New York at Buffalo,, Dep of Geological Sciences, Amherst,, NY, USA, State Univ of New York at Buffalo, Dep of Geological Sciences, Amherst, NY, USA

来源：

CLAYS AND CLAY MINERALS | 1985年 / 33卷 / 05期

关键词：

MINERALOGY - Analytical Methods - PHYSICAL CHEMISTRY;

D O I：

10.1346/CCMN.1985.0330507

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：

Previous work on the 10- and 8. 6-A hydrates identified two structural environments for the interlayer water. In one, the water is keyed into the ditrigonal holes of the silicate layer (hole water), and in the other, the water is more mobile (associated water). Both types are found in the QS-10 hydrate and halloysite(10 A), whereas only hole water occurs in the 8. 6-A hydrate. In the QS-10 hydrate, stronger hydrogen bonding between hole water and clay makes the hole water more stable than the associated water. This difference in stability is responsible for a two-step dehydration process. The less perfect structure of halloysite and its common curvilinear morphology reduce the difference in stability between hole and associated water molecules.

引用

页码：415 / 423

页数：9

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