Structural phase transitions and electrical conductivity studies of (NH4)3H(SeO4)2 crystal

被引：12

作者：

Chen, RH ^{[1
]}

Chen, TM ^{[1
]}

Shern, CS ^{[1
]}

机构：

[1] Natl Taiwan Normal Univ, Dept Phys, Taipei 117, Taiwan

来源：

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 1998年 / 59卷 / 6-7期

关键词：

structural phase transition; electrical conductivity; superionic; proton ionic conductor; inorganic compound;

D O I：

10.1016/S0022-3697(98)00007-9

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The electrical conductivity measurements were performed on single crystals of (NH4)(3)H(SeO4)(2) in the temperature range of 25 degrees C to 80 degrees C along the c* axis. The crystal is found to be in a superionic state as it transforms to the high-temperature phase. The temperature dependence of the electrical conductivity of the sample crystal in the different phases follows the Arrhenius law. The increasing electrical conduction is due to the disorder of the oxygen atoms of the SeO4 groups in the high-temperature phase. The proton ions can move among the sites which are the newly formed hydrogen bonds between the oxygen atoms of the nearest and next-nearest SeO4 groups. (C) 1998 Elsevier Science Ltd. All rights reserved.

引用

页码：1009 / 1013

页数：5

共 10 条

[1] FAST PROTON TRANSPORT IN CRYSTALS WITH A DYNAMICALLY DISORDERED HYDROGEN-BOND NETWORK [J].