Infrared Reflectance Study of Thermally Treated Li- and Cs-Montmorillonites

被引：0
|
作者：
M. A. Karakassides
D. Petridis
D. Gournis
机构：
[1] NCSR 〉〉Demokritos〉〉,Institute of Materials Science
[2] NCSR 〉〉Demokritos〉〉,Institute of Physical Chemistry
来源：
Clays and Clay Minerals | 1997年 / 45卷
关键词：
Cs-Montmorillonite; Li-Montmorillonite; Longitudinal-Optic (LO) Mode; Migration; Reflectivity; Transverse-Optic (TO) Mode;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The structure of Li- and Cs-montmorillonites was studied using infrared (IR) reflectance spectroscopy. The spectra of heat-treated clays between 80 and 220 °C were analyzed by Kramers-Krönig inversion in order to obtain the optical and dielectric properties of the clays. The analysis revealed the transverse-optic (TO) and longitudinal-optic (LO) components of the asymmetric stretching vibration of Si-O-Si bridges. Major differences, in particular the systematic development of new bands, were found in the Li-montmorillonite LO and TO spectra with increasing temperature. These changes were attributed to the migration of the Li-cations into the layer structure.
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页码：649 / 658
页数：9
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