5. EDMBs can be potentially observed in all materials that show at RP a mixture of primary covalent ppσ-bonds and secondary bonds in which LEPs are involved. Consequently, our results can be readily extrapolated to all groups 15, 16, and 17 elements (including N, O, and F). In particular, EDMB formation will occur in phosphorous at the A7-to-Ah PT experimentally reported at HP , and N could form EDMBs at pressures higher than those for which the black-P structure is found . Finally, sulfur will start showing some EDMBs in S-III or S-IV phases above 30 GPa since these phases exhibit positive pressure coefficients of all Ramanactive modes , although the Ai phase is reported in S-V above 150 GPa . In addition, the observation of EDMBs is also expected in hydrogen above 500 GPa. In this context, it must be mentioned that since EDMB is characterized by a mixture or coexistence of localized and delocalized electrons, in general, EDMBs are expected to be found in many materials at sufficiently high pressures as a prior step to full electron delocalization corresponding to the metallic bond.