XRD and HRTEM Evidence for Fixation of Cesium Ions in Vermiculite Clay
XRD and HRTEM Evidence for Fixation of Cesium Ions in Vermiculite Clay
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DOI：
10.1246/cl.2012.380
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发表时间：
2012-04-05
影响因子：
1.6
通讯作者：
Yamagishi, Akihiko
中科院分区：
文献类型：
--
作者：
Kogure, Toshihiro;Morimoto, Kazuya;Yamagishi, Akihiko
X射线衍射和高分辨率透射电子显微镜显示，蛭石粘土中的铯离子（Cs⁺）在层间空间形成了分离的单离子层。每个离子同时固定在上下硅酸盐四面体片的六边形环中心。即使在大量过量的硝酸铝[Al(NO₃)₃]或氯化六氨合钴([Co(NH₃)₆]Cl₃)存在的情况下，将含铯蛭石在80℃保持48小时，也没有铯离子被洗脱出来。
X-ray diffraction and high-resolution transmission electron microscopy showed that cesium ions (Cs+'s) in a vermiculite clay formed a segregated monoionic layer in the interlayer spaces. Each ion was fixed simultaneously at the centers of hexagonal rings in the upper and lower silicate tetrahedral sheets. No Cs+ was eluted even when Cs+-vermiculite was kept at 80 degrees C for 48 h in the presence of a large excess of Al(NO3)(3) or [Co(NH3)(6)]Cl-3.