The contribution of each atomic site is detailed with the projection of the site-resolved DOS on the respective right-hand side panels. The energy axis is horizontal and alike the band structure panels the large band gap is observed. The major difference between the three phases is in the shape of the valence band VB which is continuous in C 16 (Fig. ), whereas in the two binary compounds, there is a separation between low energy lying s-like DOS and a p-like block extending up to E V . The gap between the two blocks is largest for B 8 N 8 following the larger electronegativity difference compared to C 6 N 8 . The DOS skylines are very similar in C 16 except for the relative intensities, found highest for 4-fold as one can observe for C6 (yellow C5 DOS are underneath). In B 8 N 8 (Fig. ), the highest intensity is observed for the nitrogen versus lower DOS on B. This feature is not due to the four-fold multiplicity of N sites, but mainly because of the large charge density on N as observed in Fig. .