Determination of the modulated structure of the misfit layer compound (LaS)1.196VS2

被引：13

作者：

Cario, L ^{[1
]}

Meerschaut, A ^{[1
]}

Corraze, B ^{[1
]}

Chauvet, O ^{[1
]}

机构：

[1] Univ Nantes, CNRS, Inst Mat Jean Rouxel, UMR 6502,Lab Chim Solides,Lab Phys Cristalline 2, F-44322 Nantes 03, France

来源：

MATERIALS RESEARCH BULLETIN | 2005年 / 40卷 / 01期

关键词：

chalcogenides; layered compounds; composites; X-ray diffraction; crystal structure;

D O I：

10.1016/j.materresbull.2004.09.002

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Single crystal X-ray diffraction was used to determine the modulated structure of the misfit layer compound (LaS)(1.196)VS2. This compound crystallizes in the triclinic system with cell parameters: a(s) = 3.410 (1) Angstrom, b(s) = 5.845(1) Angstrom, c(s) = 11.191(2) Angstrom, alpha approximate to 95.15(4), beta approximate to 84.79(2)degrees, and y approximate to 89.98(2)degrees, q = 0.5978(4)a(s)* - 0.002(1)b(s)* + 0.004(2)c(s)*, and V-s = 221.2(1) Angstrom(3). A (3 + 1)D superspace group, X (1) over bar(alpha,beta,gamma), was used to analyze the complete structure (X is referring to a pseudo C centering). The largest modulation amplitudes are observed for La-S (between La (subsystem 2) and S (subsystem 1)), as well as V-V distances. In connection with the large V-V modulation, we observed the formation of "linear vanadium clusters" that may impact on the transport properties. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：125 / 133

页数：9

共 20 条

[1] Band structure and electronic properties of the incommensurate misfit compound (LaS)1.18VS2 [J].