Orthophosphates of tetravalent Ce, Th, U, Np, and Pu with the monazite structure

被引：2
作者：
Kitaev D.B. [1 ]
Volkov Yu.F. [2 ]
Orlova A.I. [1 ]
机构：
[1] Lobachevsky Nizhni Novgorod State U., Nizhni Novgorod, Russia
[2] Res. Institute of Nuclear Reactors, State Res. Ctr. of the Russ. Fed., Dimitrovgrad, ul'Yanovsk Oblast, R.
来源：
Radiochemistry | 2004年 / 46卷 / 3期
基金：
俄罗斯基础研究基金会;
关键词：
Orthophosphate; Spectroscopy; Cadmium; Structure Formation; Cell Parameter;
D O I：
10.1023/B:RACH.0000031674.74780.a8
中图分类号：
学科分类号：
摘要：
The problem of development of a ceramic phosphate matrix for solidification of the lanthanide-actinide fraction of radioactive wastes is tackled from the crystal-chemical viewpoint. New double orthophosphates of tetravalent f elements (Ce, Th, U, Np, Pu) with alkaline-earth elements and cadmium of the formulas B 0.5M 2(PO 4) 3 and B 1.5M 1.5(PO 4) 3 (B = Mg, Ca, Sr, Ba, Cd; M = Ce, Th, U, Np, Pu) were prepared. The compounds were characterized by X-ray diffraction (including high-temperature measurements) and IR spectroscopy. They crystallize in the monazite structural type (space group P2 1/n). The thermal behavior of the compounds was studied. The unit cell parameters of the phases synthesized were determined. The influence of the cationic composition on the structure formation is analyzed.
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页码：211 / 217
页数：6
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