Disorder and protonic conductivity in RbH(SO4)0.81(SeO4)0.19 mixed crystals

被引：18

作者：

Gargouri, M ^{[1
]}

Mhiri, T

Daoud, A

Réau, JM

机构：

[1] Fac Sci Sfax, Lab Etat Solide, Sfax 3038, Tunisia

[2] CNRS, Chim Solide Lab, ICMCB, F-33600 Pessac, France

来源：

SOLID STATE IONICS | 1999年 / 125卷 / 1-4期

关键词：

electrical conductivity; disordered inorganic compound;

D O I：

10.1016/S0167-2738(99)00176-9

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：

X-ray diffraction, calorimetry, vibrational and impedance spectroscopy studies of a new protonic conductor with the RbH(SO4)(0.81)(SeO4)(0.19) composition are offered. Crystals of this composition undergo five phase transitions at T = 245, 288, 353, 380 and 482K. The transition at 380 K is a superionic-protonic transition (SPT) related to a rapid [HS(Se)O-4(-)]reorientation and fast H+ diffusion. A sudden jump in the temperature dependance of conductivity confirms the presence of this transition. Above 380 K, this high temperature phase is characterized by a high electrical conductivity (10(-3)Omega(-1) cm(-1)) and low activation energy (E-a < 0.3 eV). (C) 1999 Elsevier Science B.V. All nights reserved.

引用

页码：193 / 202

页数：10

共 22 条

[1] IMPEDANCE AND MODULUS SPECTROSCOPY OF REAL DISPERSIVE CONDUCTORS [J].