Phase transitions in KLiSO₄

Abstract

Abstract An EPR study of the SO4 − radiation center revealed that KLiSO4 undergoes two phase transitions at approximate temperatures: −90°C and −20°C. A preliminary analysis of the line shapes indicates that the intermediate phase may be incommensurate. The rotation pattern of the EPR spectrum indicated that the low-temperature phases possesses fewer symmetry elements when compared with the (hexagonal) room-temperature phase. The g-factors in the two phases also differ considerably.