The synthesis, structure and properties of Hg2Os2O7

被引：20

作者：

Reading, J ^{[1
]}

Gordeev, S

Weller, MT

机构：

[1] Univ Southampton, Dept Chem, Southampton SO17 1BJ, Hants, England

[2] Univ Southampton, Dept Phys, Southampton SO17 1BJ, Hants, England

来源：

JOURNAL OF MATERIALS CHEMISTRY | 2002年 / 12卷 / 03期

关键词：

D O I：

10.1039/b109715f

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：

Hg2Os2O7 has been synthesised by direct reaction of HgO, OsO4 and Os metal at 500degreesC. The product adopts the pyrochlore structure, in common with Cd2Os2O7, but exhibits a slightly larger lattice parameter at 10.245 Angstrom. The material shows a weak transition to antiferromagnetic behaviour below 88 K; the compound remains semi-metallic through this transition but with a distinct drop in resistivity again centred on 88 K. Powder neutron diffraction data, collected over the temperature range 12 K-298 K, show weak discontinuities in the structural properties at this transition. Comparisons are made with the Cd2Os2O7 and Cd2Re2O7 systems.

引用

页码：646 / 650

页数：5

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