Structural refinement of the ternary chalcogenide compound Cu2GeTe3 by X-ray powder diffraction

被引：41
|
作者：
Delgado, GE [1 ]
Mora, AJ
Pirela, M
Velásquez-Velásquez, A
Villarreal, M
Fernández, BJ
机构：
[1] Univ Los Andes, Fac Ciencias, Dept Quim, Lab Cristalog, Merida 5101, Venezuela
[2] Univ Los Andes, Fac Ciencias, Dept Fis, Ctr Estudios Semicond,Lab Temp Bajas, Merida 5101, Venezuela
来源：
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE | 2004年 / 201卷 / 13期
关键词：
D O I：
10.1002/pssa.200406850
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The Cu2GeTe3 compound crystallizes in the Imm2 (Ndegrees44) space group, Z = 2, with a = 12.641(l) A, b = 4.2115 (2) Angstrom, c = 5.9261(2) Angstrom, V = 315.49(3) Angstrom(3). Its structure was refined from X-ray powder diffraction data using the Rietveld method. The refinement of 23 instrumental and structural variables led to RP = 8.2%, R-wp p = 11.6%, R-exp = 6.8%, R-B = 11.2 % and S = 1.7, for 5501 step intensities and 253 independent reflections. This compound is isostructural with Cu2GeSe3, and consists of a three-dimensional arrangement of slightly distorted CuTe4 and GeTe4 tetrahedra connected by common corners. (C) 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
引用
收藏
页码：2900 / 2904
页数：5
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