X-ray study of the superionic phase transition in Cu6PS5Br

被引：51

作者：

Haznar, A

Pietraszko, A

Studenyak, IP

机构：

[1] Polish Acad Sci, Inst Low Temp & Struct Res, PL-50950 Wroclaw, Poland

[2] Uzhgorod State Univ, UA-294000 Uzhgorod, Ukraine

来源：

SOLID STATE IONICS | 1999年 / 119卷 / 1-4期

关键词：

crystal structure; Cu6PS5Br; fast-ion conductor; phase transition;

D O I：

10.1016/S0167-2738(98)00479-2

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 structure of the cubic (F-43m), superionic phase of the Cu6PS5Br crystal was redetermined at 295 and 420 K. A model of an ordered anion framework and two sublattices of Cu atoms creating a three-dimensional, highly defective network is proposed. Low temperature transitions were studied by DSC analysis, and measurements of the temperature dependence of the lattice parameters were performed using the X-ray diffraction Bond method. The superionic transition at T-s = 169 K was clearly seen in the DSC curve, but does not show any diffraction anomalies and seems to be an isostructural transformation. Rietveld refinement based on powder data collected at 50 K led to the structure of an ordered Cu ion framework with Cc space group. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：31 / 36

页数：6

共 9 条

[1] PRECISION LATTICE CONSTANT DETERMINATION [J].