Coordination number
The coordination number is used to refer to metals, coordination compounds, and solid crystals. The solids are closely attached to the unit lattice, where the closest number of atoms surrounding an atom is called the coordination number. The closest atom does not have to be in the same unit grid. In chemistry, crystallography, and materials science, the coordination number of the central atom of a molecule or crystal is the number of nearby neighbors, which is determined somewhat differently than the crystal. The easiest way to determine the number of coordinates that can be known directly from the VSEPR structure is to determine the number of coordination pairs of CN = (n / 2) -3x where X is a noncenter atom, n is a valence electron, Can be obtained through equations. This is a method that is actually listed in Alen F. Lindmark's "Who Needs Lewis Structure T0 Get VSEPR Geometreis" thesis.