On the mechanism of phase transformation in Ag2Se

A differential thermal analysis ΔTy(T) in vacuum has been performed, and the temperature gradient ΔTx(T) along the Ag2Se sample during the transition α → β has been studied. It has been shown that the transitions α → α′ and β′ → β are displacive transitions and that the transition α′ → β′ is a reconstructive transition. It has been found that the temperature gradient along the sample during the transition α′ → β′ passes through a deep minimum due to a strong increase in the specific heat capacity.