Thermodynamic properties of aqueous species and the solubilities of minerals at high pressures and temperatures: the system Al2O3- H2O-NaCl

Abstract

The revised Helgeson-Kirkham-Flowers (HKF) equations of state were used together with the Huckel (1925) and Setchenow (1892) equations for activity coefficients of aqueous species and selected potentiometric data to interpret experimental solubilities reported in the literature for gibbsite, boehmite, diaspore, and corundum. The study resulted in an internally consistent set of thermodynamic data for Al3+, Al(OH)2+, Al(OH)2+, Al(OH)03, and Al(OH)4-1 which permits calculation of the standard partial molal properties of these species at temperatures to 1000°C and pressures to 5 kb. -from Authors