Observation of Two 4-Coordinated Al Sites in Montmorillonite using High Magnetic Field Strength 27Al MQMAS NMR

被引：0
作者：
Takahiro Ohkubo
Koji Kanehashi
Koji Saito
Yasuhisa Ikeda
机构：
[1] Tokyo Institute of Technology,Research Laboratory for Nuclear Reactors
[2] Advanced Technology Research Laboratory,Nippon Steel Corporation
来源：
Clays and Clay Minerals | 2003年 / 51卷
关键词：
Al MQMAS; High Magnetic Field Strength; Na-montmorillonite;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Analyses of the layer structure of Na-montmorillonite have been performed using 27Al MAS and 27Al MQMAS NMR techniques. Results of 27Al MAS NMR measurements at higher magnetic field strength (16.4 T) suggest that the 4-coordinated Al site in Na-montmorillonite has two different structures. This was confirmed by the fact that two peaks corresponding to 4-coordinated Al are observed in the 27Al MQMAS NMR at high magnetic field strength. The ratio of two 4-coordinated Al sites was found to be affected by water in the interlayer space because the area ratio of cross peaks corresponding to two 4-coordinated Al sites changes with the water content.
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页码：513 / 518
页数：5
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