Study of phase transitions in K2ZnBr4by NQR and DSC methods

Abstract The sequence of the steady-state transitions from high-temperature β-phase, as well as the metastable sequence, observed on heating of supercooled β-phase were studied on K2ZnBr4 by means of 79,81Br NQR and DSC methods. The low-temperature phase of the metastable sequence is confirmed1 to be C1c1 (Z = 48), the metastable ferroelectric phase is P21 cn (Z = 12), the transition into incommensurate phase occurs at about 18°C.