New phase transition in LiKSO4

Bansal, M. L. ; Deb, S. K. ; Roy, A. P. ; Sahni, V. C. (1980) New phase transition in LiKSO4 Solid State Communications, 36 (12). pp. 1047-1050. ISSN 0038-1098

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Official URL: http://linkinghub.elsevier.com/retrieve/pii/003810...

Related URL: http://dx.doi.org/10.1016/0038-1098(80)90034-4

Abstract

A subtle first order phase transition in LiKSO4 has been discovered with the help of a temperature dependent study of the Raman intensity measurements of certain polar modes in different polarization configurations. The room temperature hexagonal C66 (P63) phase transforms to trigonal C43v (P31c) phase at 201°K while cooling; the reverse transformation (on heating) takes place at 242°K. The phase transition appears to be primarily associated with a cooperative reorientation of SO4 tetrahedra in the crystal.

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