STRUCTURAL REFINEMENT OF AG(3)SI BY SINGLE-CRYSTAL X-RAY-DIFFRACTION METHOD

被引：6

作者：

CHO, N ^{[1
]}

KIKKAWA, S ^{[1
]}

KANAMARU, F ^{[1
]}

YOSHIASA, A ^{[1
]}

机构：

[1] HIROSHIMA UNIV,FAC SCI,HIROSHIMA 730,JAPAN

来源：

SOLID STATE IONICS | 1994年 / 68卷 / 1-2期

关键词：

D O I：

10.1016/0167-2738(94)90233-X

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 phase transformation from beta-Ag3SI with Pm3m to alpha-Ag3SI with Im3m occurs with an order-disorder transition of anions. This observation was discussed on the base of the local anion ordered structure in alpha-Ag3SI at 519 K. On the beta-alpha transformation, abnormally large lattice expansion of alpha-Ag3SI was observed in a temperature range of 520 K to 590 K. Structure refinements of alpha-Ag3SI were carried out at high temperatures above 590 K and the weighted R values were in a range between 0.027 and 0.041. Structure analysis was also carried out at 153 K on the alpha-Ag3SI crystal which was obtained by quenching to 153 K from 703 K. These structure analyses revealed that Ag ions in alpha-Ag3SI statistically distribute on 8c and 24g sites with Ag occupancies of about 0.07 and 0.10, respectively.

引用

页码：57 / 63

页数：7

共 10 条

[1] A SINGLE-CRYSTAL NEUTRON-DIFFRACTION STUDY OF THE DISTRIBUTION AND THERMAL MOTION OF SILVER IONS IN ALPHA-AG3SI AND BETA-AG3SI [J].