The most important characteristics of the Voronoi-Dirichlet polyhedra (VDP) of A atoms (A = Na, Mg, Al, Si, P, S, Cl, or Ar) were determined. The sublattices contain chemically identical A atoms in the crystal structures of 232006 inorganic, coordination, and organoelement compounds. The VDP of A atoms have most often 14 faces, the Fedorov cuboctahedron being the most abundant VDP type. The effect of the nature of the A atoms on the characteristic A-A interatomic distances in the homoatomic sublattices of the crystal structures was considered.