The compositional phase diagram of the Ag 1 -x Pd x solid solution calculated from the three different CEs is shown in Fig. . The main feature is a miscibility gap, but in this case only for a narrow compositional interval towards the Pd-rich end of the phase diagram. The agreement between the calculated and experimental phase diagrams is already reasonable for the DFT based CE. The vibrational free energy only leads to a slight stabilisation of the mixed phases, but also in this case, it leads to an improved agreement with experimental results. The best agreement is again observed when end-members are constrained to DFT values and the remaining free energies are calculated from the MLFF.