Synthesis, structure, and magnetism of Np2O5

被引：59
|
作者：
Forbes, Tori Z.
Burns, Peter C. [1 ]
Skanthakumar, S.
Soderholm, L.
机构：
[1] Univ Notre Dame, Dept Civil Engn & Geol Sci, Notre Dame, IN 46556 USA
[2] Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA
来源：
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2007年 / 129卷 / 10期
关键词：
D O I：
10.1021/ja069250r
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The binary oxide Np2O5 has been synthesized by mild hydrothermal reaction and its crystal structure has been determined. It is monoclinic, P2/c, Z = 4, a = 8.168(2), b = 6.584(1), c = 9.313(1) A, beta = 116.09(1)degrees, V = 449.8(2) A(3). The structure contains neptunyl square and pentagonal bipyramids that are linked into sheets by edge-sharing. Cation-cation interactions occur within the sheet of polyhedra and provide linkages of the sheets into a three-dimensional structure. Np2O5 undergoes antiferromagnetic ordering at 22(3) K, the highest magnetic ordering temperature observed for any neptunyl compound, and is only the second neptunyl compound found to order antiferromagnetically.
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页码：2760 / +
页数：3
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