Comparison of condensed phase Gibbs free energy data from Sharp & Huebner (1990, orange), fits to the NIST-JANAF database done by the authors of this paper for GGCHEM (green), and fits to the SUPCRTBL data (Zimmer et al. 2016, blue). The SUPCRTBL data points have been generated for temperatures 100 to 2500 K according to the equations and parameters given in Zimmer et al. (black dashed curve). Lower plot: deviations [kJ mol⁻¹] with respectto the mean of all three data sources.