The exothermal effect at 917°C is due to a solid-state transition in the sample.

Recent applications of differential scanning calorimetry in the study of solid–solid transformations are presented.

Turner and I. S. Servi developed homogeneous nucleation theory for a solid-solid transformation, providing the technologically important basis for strengthening metallic alloys through precipitation hardening.

Values for the rale constant K and the exponent n characterizing the transformation were computed from the x(t) data using Cahn's nucleation and growth model for solid–solid transformations.

It was found that the solid compounds RbNbCl6, CsNbCl6, RbTaCl6, and CsTaCl6 undergo allotropie solid–solid transformations and the enthalpies and entropies associated with these phase changes, as well as from fusion, have been evaluated.