X-ray study of the superionic phase transition in Cu6PS5Br

被引：50
|
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
收藏
页码：31 / 36
页数：6
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