Considering the LEP picture, the results in Fig. for pnictogens can be understood in the following way: In stage 1, the single-basin LEP found at RP suffers a considerable distortion due to the increasing interlayer interaction as pressure increases that is caused by the strong compression of the interlayer distance. At the same time, the trans influence in stage 1 slightly increases the charge of the secondary bond at the expense of the primary covalent ppσ-bond. The LEP distortion ends with the splitting of the single ELF basin into three ELF basins (onset of stage 2) that are aligned along the three secondary bonds. On further increase of pressure, the LEP starts to become inactive due to a gradual decrease in the LEP charge. This is evidenced in As by the decrease of the strength of the band located below the Fermi level in the pCOHP profile along the primary bond (Fig. ). In other words, the LEP becomes depopulated in stage 2 as pressure increases. This result is consistent because the decrease of the LEP stereoactivity at HP is a well-known phenomenon in materials . In other words, the LEP becomes depopulated in stage 2 as pressure increases. This result is consistent with the LEP depopulation (or delocalization) process already reported in Te at HP . Concomitantly, a much larger trans influence occurs in stage 2 than in stage 1 (Fig. ), which is consistent with the strong decrease of phonon frequencies in As and Sb above 16 and 4 GPa, respectively. The trans influence ends at Pt when the secondary bonds acquire equal or almost equal charge to the primary bonds (onset of stage 3), so six lobes or basins are observed around each atom corresponding to the three pairs of orthogonal MMBs in the Ah phase.