Gibbs Free Energy of Water at Elevated Temperatures and Pressures with Applications to the Brucite-Periclase Equilibrium

Tables of the Gibbs free energy of water for temperatures up to 800° C. and pressures up to 2,500 bars are presented. These tables have been prepared by using Keenan and Keyes's thermodynamic data on water at low pressures and by graphically integrating Kennedy's specific-volume data to high pressures. The equilibrium curve for the brucite-periclase reaction is calculated by using these data, and the results of the calculations are compared with direct experimental work on the system MgO-H₂O.