Morphology and orientation of curling of kaolinite layer in hydrate

In order to determine if there are curlings along other directions than [100] and [010] in kaolinite (Kaol) layer, 1 nm Kaol hydrate with 85% yield was synthesized by the fluorine-free method. Its structure and morphology were investigated by X-ray diffraction (XRD), field emission transmission elec...

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Bibliographic Details
Published in:Applied clay science 2014-11, Vol.101, p.215-222
Main Authors: Niu, Jinan, Qiang, Yinghuai, Li, Xiang, Liu, Zhangsheng, Zhang, Shenghui, Feng, Peizhong, Ou, Xuemei
Format: Article
Language:English
Subjects:
Diffraction
Earth sciences
Earth, ocean, space
Exact sciences and technology
Hydrates
Kaolinite
Matching
Mineralogy
Morphology
Orientation
Silicates
X-ray diffraction
X-rays
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Summary:In order to determine if there are curlings along other directions than [100] and [010] in kaolinite (Kaol) layer, 1 nm Kaol hydrate with 85% yield was synthesized by the fluorine-free method. Its structure and morphology were investigated by X-ray diffraction (XRD), field emission transmission electron microscopy (FETEM) and selected area electron diffraction (SAED). The results show that: (1) there are not only single curling and two opposite parallel curlings, but also two adjacent curlings with about 120 degree angle in one single layer; (2) there are four new orientations of curlings [11[macr]0], [110], [310] and [31[macr]0] in Kaol hydrate. The reasons that Kaol layers can curl along multiple directions may be that: first, two types of incompatible matchings between tetrahedrons and octahedrons; second, the hexagonal distribution and the zigzag distribution of two types of matchings.
ISSN:0169-1317
1872-9053
DOI:10.1016/j.clay.2014.08.003