Finally, the stability of the most stable materials on the binary phase diagrams presented in this work are quite different depending on which correction method is applied. In figure (standard In the left column, all data is plotted where both DFT and experimental energies are known, and the energies are normalized per atom. In the right column, the energies are normalized per oxygen atom, and only structures that contain oxygen are plotted. In the first row (A and C), no correction is applied. In the second row (B and E), the standard correction is applied. In the third row (C and F), the 110% PBE correction is applied. All DFT+U calculations and structures are excluded here. Note that the mean absolute error (MAE) is higher in the column on the right because it is normalized by oxygen atom. The corresponding MAE values, normalized per atom are 0.25 eV/atom for plot D, 0.15 eV/atom for plot E, and 0.07 eV/atom for plot F. correction), the most stable CuS structure has a formation energy of about -0.45 eV/atom, and in figure 3B (our correction), the same structure has a formation energy of only -0.2 eV/atom. Both of these formation energies constitute stable compounds, but this is a large difference in formation energy that may have implications on how easy or hard the material likely is to synthesize.