STRUCTURAL STUDIES OF GLASSY (LI2S)0.5(SIS2)0.5 BY ISOTOPIC-SUBSTITUTION NEUTRON DIFFRACTION
STRUCTURAL STUDIES OF GLASSY (LI2S)0.5(SIS2)0.5 BY ISOTOPIC-SUBSTITUTION NEUTRON DIFFRACTION
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同位素取代中子衍射研究玻璃态 (LI2S)0.5(SIS2)0.5 的结构
DOI：
10.1103/physrevb.56.10934
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发表时间：
1997
影响因子：
3.7
通讯作者：
S. Elliott
中科院分区：
文献类型：
--
作者：
J. Lee;A. Pradel;G. Taillades;M. Ribes;S. Elliott
用Li同位素替代中子衍射方法研究了超离子玻璃（Li2S）0.5（SiS2）0.5的结构。一个显着的差异已被观察到的第一个尖锐的衍射峰（FSDP）的强度的结构因子的两个同位素取代的玻璃含有Li同位素nat Li和6 Li，具有相反的符号的散射长度。有人发现，这种行为可以解释的空隙模型，其中FSDP可以被视为起源于原子密度波动所产生的化学有序的间隙空隙。在短的长度尺度的总相关函数的峰值识别和理解的移动的离子Li+的环境已尝试通过一阶差分分析。结果发现，每个Li+阳离子周围可能有三个S−阴离子。
The structure of the superionic glass (L i 2 S) 0.5 (S i S 2) 0.5 has been studied using Li-isotopic-substitution neutron diffraction. A marked difference has been observed in the intensity of the first sharp diffraction peak (FSDP) in the structure factor of two isotopically substituted glasses containing the Li isotopes nat Li and 6 Li, having opposite signs of the scattering length. It was found that this behavior can be explained by a void model, in which the FSDP can be regarded as originating from atomic-density fluctuations arising from the chemical ordering of interstitial voids. Peak identifications at short-length scales in the total correlation functions were made and an understanding of the environment of the mobile ion Li+ has been attempted by means of a first-difference analysis. It was found that probably three S− anions surround each Li+ cation.