Crystal Structure and Cation Exchanging Properties of A Novel Open Framework Phosphate of Ce (IV)

被引：6

作者：

Bevara, Samatha ^{[1
,2
]}

Achary, S. N. ^{[1
,2
]}

Patwe, S. J. ^{[1
]}

Sinha, A. K. ^{[3
]}

Mishra, R. K. ^{[4
]}

Kumar, Amar ^{[4
]}

Kaushik, C. P. ^{[4
]}

Tyagi, A. K. ^{[1
,2
]}

机构：

[1] Bhabha Atom Res Ctr, Div Chem, Bombay 400085, Maharashtra, India

[2] Homi Bhabha Natl Inst, Bombay 400094, Maharashtra, India

[3] Raja Ramanna Ctr Adv Technol, Indus Synchrotrons Utilizat Div, Indore 452013, Madhya Pradesh, India

[4] Bhabha Atom Res Ctr, Waste Management Div, Bombay 400085, Maharashtra, India

来源：

DAE SOLID STATE PHYSICS SYMPOSIUM 2015 | 2016年 / 1731卷

关键词：

Complex phosphate; Crystal structure; Ion exchange; Nuclear waste management;

D O I：

10.1063/1.4948206

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Herein we report preparation, crystal structure and ion exchanging properties of a new phosphate of tetravalent cerium, K2Ce(PO4)(2). A monoclinic structure having framework type arrangement of Ce(PO4)(6) units formed by CeO8 square-antiprism and PO4 tetrahedra is assigned for K2Ce(PO4)(2). The K+ ions are occupied in the channels formed by the Ce(PO4)(6) and provide overall charge neutrality. The unique channel type arrangements of the K+ make them exchangeable with other cations. The ion exchanging properties of K2Ce(PO4)(2) has been investigated by equilibrating with solution of Sr-90 followed by radiometric analysis. In optimum conditions, significant exchange of K+ with Sr2+ with K-d similar to 8000 mL/g is observed. The details of crystal structure and ion exchange properties are explained and a plausible mechanism for ion exchange is presented.

引用

页数：3

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