It was already suggested by Hoffmann and coworkers that Sb atoms in sc-Sb and in the planar Sb square array of BaZnSb2 feature ERMBs . However, we find, in a similar way as for sc-Sb, that Sb-Sb bonds in BaZnSb2 (d=3.24 Å) have ET = 0 and ES = 1.16. These ET and ES values are closer to those of MMBs in PCMs and EDMBs in B2H6 than to those of ERMBs in I3 ꟷ (see Fig. ). Moreover, the bond distance is of the same order as that of the Sb-Sb bonds reported in sc-Sb at RP (d = 3.16 Å) and much larger than the covalent bond of Sb in the A7 phase at RP (d = 2.96 Å). Therefore, we consider that Sb-Sb bonds in BaZnSb2 are EDMBs. Our claim for EDMBs between Sb atoms of the square planar array in BaZnSb2 is supported by Jeitschko and who also suggested the presence of EDMBs with 0.5 bond order in As-As and Sb-Sb bonds in the square planar array of isostructural intermetallic compounds ACuAs2 and AAgSb2 (A= rare earth and uranium) . Moreover, our claim for EDMB in BaZnSb2 is also supported by Nesper, who suggested that Bi-Bi bonds at the square planar array of Bi atoms in the Zintl phase of LiBi are 2c-1e bonds with 0.5 bond order . Remarkably, the atoms in the square planar arrays of LiBi, BaZnSb2, and ACuAs2 and AAgSb2 intermetallics show a square planar geometry as that of Fig. , which is similar to that of the molecule XeF4 with ERMBs.