Calculation of the standard thermodynamic potentials of aluminum sulfates and basic aluminum sulfates

The standard enthalpies, entropies, and Gibbs energies of formation from elements were calculated for compounds in the Al-S-O-H system. The thermodynamic parameters of minerals, aluminum sulfates and hydroxide sulfates with water of crystallization, were recommended on the basis of analysis of calculation errors. The reliability of the resulting values was tested compared to the solubility experimental data of aluminum sulfate.