Glass transition and entropy: Kauzmann's paradox
Amorphous and glassy states of molecular and pharmaceutical compounds: general properties

After melting, the entropy of a liquid is higher than that of the crystal. Since the C_p (C_p = T ∂S / ∂T) of a liquid is higher than that of the crystal, the entropy S of the liquid decreases faster than that of the crystal. For brittle liquids, the entropy difference between liquid and crystal decreases by around a factor of 3 between T_m and T_g. For most glass formers, especially molecular compounds, extrapolation below T_g of the entropy evolution S (T), measured at higher temperatures, leads to a virtual crossover with the crystal entropy at a positive temperature T_K (Kauzmann temperature