Analysis of the specific heat data of a partially disordered, kinetically frozen state of Mg_3 Cd crystal shows that, as for glass relaxation, its atomic diffusion rate is nonexponential but less nonlinear. As its state transforms on heating to an equilibrium disordered state in a time-dependent manner, the enthalpy increases by 362.8 J/mol and the entropy by 1.28 J/mol K. Increase in the vacancy population on heating raises the probability of partial disintegration of its superlattice. Kinetic-unfreezing temperature is the same in the enthalpy and entropy considerations. If that were found also for a glass, its configurational entropy would be finite.
展开▼
