Abstract
Usually in the literature metal bond is described as implemented through socialization external electrons of atoms and not possessing the property orientation. Although there are attempts (see below) to explain directed metal bond as the elements crystallize into a certain type of lattice. In the work \ "Nature of chemical elements" \ It was shown that the metallic bond in the densest packages (HEK and HCC) between a centrally chosen atom and its neighbors in the general case, presumably, is carried out by means of 9 (nine) directed links, in contrast to the number of neighbors equal to 12 (twelve) (coordination number). Probably \ "strange \" three (3) atoms are present in the coordination number 12 stereometrically, and not because of the connection. The answer should be an experimental test. These theoretical studies of the metallic bond in pure homogeneous metals led me to the fact that changes in the crystal lattices of lithium and beryllium as a fun