High-temperature phase transition studies in a novel fast ion conductor, Na2Cd(SO4)2, probed by Raman spectroscopy

Gopal K Pradhan; Diptikanta Swain; Tayur N Guru Row; Chandrabhas Narayana

doi:10.1021/jp808557x

High-temperature phase transition studies in a novel fast ion conductor, Na2Cd(SO4)2, probed by Raman spectroscopy

J Phys Chem A. 2009 Feb 26;113(8):1505-7. doi: 10.1021/jp808557x. Epub 2009 Jan 22.

Authors

Gopal K Pradhan¹, Diptikanta Swain, Tayur N Guru Row, Chandrabhas Narayana

Affiliation

¹ Light Scattering Laboratory, Chemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR), Jakkur P.O., Bangalore 560064, India.

PMID: 19161291
DOI: 10.1021/jp808557x

Abstract

Temperature-dependent Raman spectroscopic studies were carried out on Na(2)Cd(SO(4))(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 SO(4) 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 SO(4) ion leads to restriction of Na(+) mobility. Above 565 degrees C, the SO(4) ion starts to rotate freely, leading to increased mobility of Na(+) ion in the channel.