Time dependent phase transition in K2ZnBr4

Abstract K2ZnBr4 undergoes the first order phase transition at around 470 K from the low temperature α-state with Sr2GeS4 structure to the high temperature β-state with β-K2SO4 structure. The metastable β-state was realized at low temperatures by rapid cooling and the recovering process toward the essentially stable α phase was investigated by measuring dielectric constants as a function of time.