The values of the standard Gibbs energies of formation for minerals of the Ag-Au-Se-Te system have been calculated using additive elemental contributions. Calculations of the thermodynamic equilibria of the system under consideration at the initial state of one mole of noble metals and variable chalcogen contents at 25°C and atmospheric pressure were carried out in the “Selector” program complex (PC). The simulation results showed that silver is more actively involved in the composition of minerals than gold. At certain concentrations of selenium and tellurium, noble metals do not form native forms.
O.V. Eremin (Wed,) studied this question.