热液循环
材料科学
沸石
化学工程
矿物学
高压灭菌器
白榴石
结晶
水热反应
作者
Zhenzi Jing,Kunchuan Cai,Li Yan,Junjie Fan,Yi Zhang,Jiajun Miao,Yuqian Chen,Fangming Jin
标识
DOI:10.1016/j.jnucmat.2017.03.008
摘要
Abstract Pollucite, as a perfect long-term potential host for radioactive Cs immobilization, barely exists in pure form naturally but in an isomorphism form between pollucite and analcime due to coexistence of Cs and Na. Pollucite could be hydrothermally synthesized with Cs-polluted soil or clay minerals which contain Cs and Na, and it is necessary to study the properties of the synthesis if Cs and Na contained. Pure pollucite, analcime and their solid solutions were hydrothermally synthesized with chemicals, and it was found that the most formed pollucite analcime solid solutions with Cs/(Cs + Na) ratios of 2/6–5/6 had very similar properties in mineral composition, morphology and size, structural water (Cs cations) and coordination environment to pollucite. This also suggests that even coexistence of Cs and Na in nature, pollucite favors to form due to site preference for Cs over Na, which leads to the property and the structure of the most solid solutions similar to that of pollucite.
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