Predicting the temperature for the solid-solid phase transition in II-VI semiconductor alloys

► The temperature for the solid-solid phase transition in certain II-VI alloys is predicted. ► The binary solids are modeled as a solid solution. ► Chemical potentials for each phase are developed with activity coefficients. ► The quasi-chemical model is used to compute the activity coefficients. ► Equating the chemical potentials leads to an estimate or the transition temperature.