Swain, Diptikanta ; Bhadram, Venkata Srinu ; Pradhan, Gopal K. ; Venkataprasad Bhat, S. ; Narayana, Chandrabhas ; Rao, C. N. R. (2010) Superionic phase transition in KHSO4: a temperature-dependent Raman investigation The Journal of Physical Chemistry A, 114 (37). pp. 10040-10044. ISSN 1089-5639
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Official URL: http://pubs.acs.org/doi/abs/10.1021/jp103005g
Related URL: http://dx.doi.org/10.1021/jp103005g
Abstract
Temperature-dependent Raman spectroscopic studies have been carried out on KHSO4 single crystals in the temperature range 298-493 K. A structural phase transition driven by the lattice and molecular disorder is observed at 473 K. The spectral data enable an understanding of the nature of the lattice disorder across the phase transition leading to the superionic phase. The disorder in the HSO4− polymeric hydrogen-bonded chain leading to a higher symmetry in the high temperature phase is clearly captured from our Raman results. The internal S-OH and S-O stretching modes and, to a limited extent, the external modes throw light on the disorder mechanism and the enhancement of conductivity after transition.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to American Chemical Society. |
| ID Code: | 43470 |
| Deposited On: | 11 Jun 2011 13:33 |
| Last Modified: | 11 Jun 2011 13:33 |
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