The role which was played by the entropy of fusion with regard to phase transformation characteristics and the self-diffusion behavior of crystalline matrices was considered. Data which correlated the entropy of fusion to other properties of metals, alkali halides and other inorganic compounds were analyzed. It was shown that the occurrence of a solid-solid phase transformation decreased the magnitude of the entropy of fusion. The self-diffusion rates in any class of solid scaled inversely with the entropy of fusion. The functional relationship of the entropy to the compressibility and the volume expansion coefficient was also considered. It was concluded that the entropy of fusion was not just a physical parameter that described the energy changes which were associated with melting. It was instead closed related to the bulk properties of the solid, and uniformly and consistently controlled the phase transition characteristics and self-diffusion behavior in any group or class of solid.

Role of Entropy of Fusion in Phase Transformation and Self-Diffusion. G.P.Tiwari, J.M.Juneja, Y.Iijima: Journal of Materials Science, 2004, 39[5], 1535-46