Diffusion of lanthanum into single-phase sodium zirconium phosphate matrix for nuclear waste immobilization

被引：3

作者：

Bohre A. ^{[1
]}

Shrivastava O.P. ^{[1
]}

机构：

[1] Department of Chemistry, Dr. H.S. Gour University

来源：

Radiochemistry | 2013年 / 55卷 / 4期

关键词：

ceramic; GSAS; LaNZP; powder X-ray diffraction; radioactive waste; Rietveld refinement;

D O I：

10.1134/S1066362213040176

中图分类号：

学科分类号：

摘要：

Sodium zirconium phosphate (NZP) is a potential material for immobilization of nuclear effluents. Up to ∼2.17 mol % (10.71 wt %) lanthanum could be loaded into NZP formulations without significant changes in the three-dimensional framework structure. The crystal chemistry of Na1+x Zr2-x La x P3O12 (x = 0.1-0.5) phases was investigated using General Structure Analysis System programming. The LaNZP phases crystallize in space group R3c with Z = 6. Powder diffraction data were subjected to Rietveld refinement to arrive at a satisfactory structural convergence of R-factors. The PO4 stretching and bending vibrations in the IR region were assigned. SEM and EDAX analysis provide evidence of La in the matrix. © 2013 Pleiades Publishing, Ltd.

引用

页码：442 / 449

页数：7

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