Structural study of caesium-based britholites Sr7La2Cs(PO4)5(SiO4)F2

被引：5
|
作者：
Boughzala, Khaled [1 ]
Gmati, Nadia [1 ]
Bouzouita, Khaled [1 ]
Ben Cherifa, Ali [2 ]
Gravereau, Pierre [3 ]
机构：
[1] Fac Sci, Dept Chim, UR Mat Inorgan, Monastir 5000, Tunisia
[2] Fac Sci Tunis, Dept Chim, Lab Thermodynam Appl, Tunis 1060, Tunisia
[3] Univ Bordeaux, CNRS, Inst Chim Matiere Condensee, UPR9048, F-33608 Pessac, France
来源：
COMPTES RENDUS CHIMIE | 2010年 / 13卷 / 11期
关键词：
Strontium; Britholites; Cesium; X-ray diffraction; NMR spectroscopy; STANDARD ENTHALPY; IMMOBILIZATION; NUCLEAR; REFINEMENT; ACTINIDES; APATITES; BEHAVIOR; WASTE;
D O I：
10.1016/j.crci.2010.01.006
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Several studies demonstrated the ability of britholites to retain radionuclides such as the caesium and actinides. Therefore, three compounds with formulas Sr8LaCs(PO4)(6)F-2, Sr7La2Cs(PO4)(5)(SiO4)F-2 and Sr2La7Cs(SiO4)(6)F-2, were prepared by solid state reaction. However, it seems that only the mono-silicated composition was obtained in a pure state. In this present work, the X-ray diffraction and magnetic nuclear resonance have been used to investigate the structure for this composition. The results showed that in fact this phase was not pure, but it was mixed with a secondary phase, SrLaCs(PO4)(2). The refinement by the Rietveld method allowed also to precise the distribution of La3+ and Cs+ ions between the two cationic sites of the apatite. (C) 2010 Academie des sciences. Published by Elsevier Masson SAS. All rights reserved.
引用
收藏
页码：1377 / 1383
页数：7
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