LOCAL STRUCTURE AROUND ACTINIDES IN BOROSILICATE GLASSES

被引：17
|
作者：
Petit-Maire, D. [1 ,2 ,3 ]
Petiau, J. [1 ,2 ]
Calas, G. [1 ,2 ]
Jacquet-Francillon, N. [3 ]
机构：
[1] Univ Paris 07, UA CNRS 09, F-75252 Paris 05, France
[2] Univ Paris 06, Lab Mineral Cristallog, F-75252 Paris 05, France
[3] CEA VALRHO, F-30205 Bagnols Sur Ceze, France
来源：
JOURNAL DE PHYSIQUE | 1986年 / 47卷 / C-8期
关键词：
D O I：
10.1051/jphyscol:19868163
中图分类号：
学科分类号：
摘要：
X-ray absorption and optical absorption spectroscopy have been used to study the valence state and local structure of uranium and thorium in borosilicate glasses. Glasses of composition similar to those studied for the nuclear-waste storage are compared to glasses of simplified composition. Thorium atoms are in the valence state (IV) with an oxygen environment of eight atoms. Uranium is very sensitive to the glass composition. The valence states (IV), (V), and (VI) are simultaneously present and correspond to different local organizations.
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页码：317 / 320
页数：4
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