- A pseudopotential method is applied to construct the thermodynamical potential of a binary solid solution. The state equation is solved for a disordered solid solution. The mixing energy is shown to be a complex concentration function depending on the type of the crystalline lattice. The influence of a uniform compression on the solubility of alloy components is investigated, the enthalpy and work function under adiabatic compression are determined. The numerical calculations are carried out for MgZn and BaCd systems. [Russian Text Ignored].