THE STRUCTURAL AND ELECTRONIC-PROPERTIES OF NA4UO5 AND NA4NPO5

被引：10
作者：
BICKEL, M [1 ]
KANELLAKOPULOS, B [1 ]
POWIETZKA, B [1 ]
机构：
[1] KERNFORSCHUNGSZENTRUM KARLSRUHE GMBH,INST HEISSE CHEM,W-7500 KARLSRUHE 1,GERMANY
来源：
JOURNAL OF THE LESS-COMMON METALS | 1991年 / 170卷 / 01期
关键词：
D O I：
10.1016/0022-5088(91)90061-8
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The crystallographic and spectroscopic properties, as well as the magnetic susceptibility of Na4NpO5, were found to be in agreement with a tetragonal structure, space group C4h-I4/m, already proposed by previous authors. The lattice constants were evaluated to a = 750.7 pm and c = 461.1 pm. The magnetic susceptibilities of Na4UO5 and Na4NpO5 are comparable with data from other 5f0 and 5f1 systems, respectively. The absence of a magnetic transition in Na4NpO5 is suspected to be due to the possible existence of a "critical Np-Np distance", above which exchange interactions are too small to cause ordering.
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页码：161 / 169
页数：9
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