SYNTHESIS, STRUCTURE AND PROPERTIES OF BARIUM NIOBIUM TRISELENIDE

被引：6

作者：

CHEN, BH

SAGHISZABO, G

EICHHORN, B

PENG, JL

GREENE, R

机构：

[1] UNIV MARYLAND,DEPT BIOCHEM,COLL PK,MD 20742

[2] UNIV MARYLAND,DEPT PHYS & ASTRON,COLL PK,MD 20742

来源：

MATERIALS RESEARCH BULLETIN | 1992年 / 27卷 / 10期

关键词：

BARIUM; NIOBIUM; SELENIDES;

D O I：

10.1016/0025-5408(92)90233-P

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The compound BaNb0.8Se3 was prepared from BaSe, Nb, and elemental selenium in a sealed silica tube at 800-degrees-C. The structure was refined from X-ray powder diffraction data, using a Rietveld profile analysis, which yielded the following residuals: R = 9.46 %, R(wp) = 9.25 %, R(bragg) = 9.73 %. The compound has the BaVS3 structure type (space group P6(3)/mmc) with a = 7.1216(5) and c = 5.9796(5) angstrom. Pertinent bond distances (A) are: Nb-Nb = 2.990(1); Ba-Se = 3.562(6), 3.576(6); Nb-Se = 2.618(9). Magnetic susceptibility and resistivity studies showed the compound to be diamagnetic (chi0 = -7.8 x 10(-5) emu/mol) and semiconducting with a 0.1 eV activation energy.

引用

页码：1249 / 1253

页数：5

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