Evaluation of thermodynamic data and phase equilibria in the system Ca-Cr-Cu-Fe-Mg-Mn-S Part II: Ternary and quasi-ternary subsystems

The Ca-Cr-Cu-Fe-Mg-Mn-S system has been thermodynamically assessed using all available experimental data. Sulfur is introduced into the thermodynamic description of 8 solid solution phases such as Thiospinel, Digenite, Oldhamite, Cu2S-I, Cu2S-II, Pyrrhotite, Brezinaite, Chalcopyrite-HT using available experimental information. Particular attention was given to the phase Pyrrhotite which forms at high temperatures a solid solution with end-members Fe1−xS and Cr1−xS in the ternary Cr-Fe-S system, and also the phase Digenite, which exhibits very wide solubility toward Pyrrhotite in the Cu-Fe-S system. In this part of the report ternary and quasi-ternary subsystems are presented while all relevant binary systems as well as pseudo-binary sections have already been presented in Part I of this series. •Ca-Cr-Cu-Fe-Mg-Mn-S system thermodynamically assessed.•Ternary Me1-Me2-S and quasi-ternary systems Me1S-Me2S-Me3S considered here.•Modified associate species model used for the liquid phase.•8 solid solutions introduced using the multi-sublattice approach.•Calculated phase diagrams and thermodynamic properties in good agreement with the experimental data.