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Study of thermal disordering of the KSc(WO4)2 crystal structure by Raman spectroscopy

Mączka M., Hanuza J., Sidorov N., Kojima S.

Materials Science

2002

Vol. 20, No. 1

105-110

Raman spectra of KSc(WO4)2, exhibiting three reversible phase transitions from a trigonal phase to monoclinic and triclinic structures, have been studied in the temperature region of 100-294 K. The mea surements have revealed the presence of significant broadening of librational and translational modes of the ??24 WO ions with increasing temperature. This broadening was explained as a result of anisotropic activation of the complex ion reorientations.