Graphical Comparison of Mineral Gibbs Free Energy Data

Abstract

The following pages show plots of the Gibbs-free energy of formation ΔGӨf [kJ/mol] from free atoms as function of temperature T [K] of 121 solid minerals from the SUPCRTBL database (Zimmer et al., 2016). These thermo-chemical data are compared to other data sources in a second plot if available. The other data sources include (Sharp & Huebner, 1990, indicated by SH90) and fits done by the authors to the NIST-Janaf data (Chase, 1986, indicated by GGchem). The comparison plot shows differences to the mean data as indicated. The SUPCRTBL data points have been generated for temperatures 100 K to 2500 K according to the equations and parameters given in Zimmer et al.