High-Temperature Phase Transition Studies in a Novel Fast Ion Conductor, Na2Cd(SO4)2, Probed by Raman Spectroscopy

被引：10

作者：

Pradhan, Gopal K. ^{[1
]}

Swain, Diptikanta ^{[2
]}

Row, Tayur N. Guru ^{[2
]}

Narayana, Chandrabhas ^{[1
]}

机构：

[1] Jawaharlal Nehru Ctr Adv Sci Res, Light Scattering Lab, Chem & Phys Mat Unit, Bangalore 560064, Karnataka, India

[2] Indian Inst Sci, Solid State & Struct Chem Unit, Bangalore 560012, Karnataka, India

来源：

JOURNAL OF PHYSICAL CHEMISTRY A | 2009年 / 113卷 / 08期

关键词：

ANION REORIENTATION; LITHIUM MODES; SULFATE ION; LANGBEINITES; CRYSTAL;

D O I：

10.1021/jp808557x

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：

Temperature-dependent Raman spectroscopic studies were carried out on Na2Cd(SO4)(2) from room temperature to 600 degrees C. We observe two transitions at around 280 and 565 degrees C. These transitions are driven by the change in the SO4 ion. On the basis of these studies, one can explain the changes in the conductivity data observed around 280 and 565 degrees C. At 280 degrees C, spontaneous tilting of the SO4 ion leads to restriction of Na+ mobility. Above 565 degrees C, the SO4 ion starts to rotate freely, leading to increased mobility of Na+ ion in the channel.

引用

页码：1505 / 1507

页数：3

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