GROUP 1 - HEAT-CAPACITY MODELS FOR CRYSTALLINE PHASES FROM 0 K TO 6000 K

The goal of this group was to adopt or develop models to represent the heat capacity of an element or compound in the crystal, liquid, or ga seous states. For the condensed phases, it is a relatively straight fo rward procedure to treat heat capacity and/or enthalpy data mathematic ally to generate temperature dependent thermal functions. To represent these same thermal functions by a universal model is not always so ea sy. It is important to note that the ''highest quality'' set of therma l functions might not always be compatible with a universal model. Alt hough other groups were discussing transition phenomena and the extrap olation into metastable regions for the condensed phases, we recognise d that their deliberations would have a great impact on our proposal.