Analysis of the environment of alkali metal atoms in fluoride structures

The details of the environment of 664 crystallographic sorts of alkali meta ls (M) in the structure of 407 fluorine compounds were analyzed in terms of Voronoi-Dirichlet (VD) polyhedra. New procedures based on the VD polyhedro n notions were applied to determine the composition of the coordination sph ere of atoms M. The dimensions of the domain of influence of atom M are ind ependent of its coordination number. The features of the interatomic distan ce distributions in the coordination sphere: of atoms M R(M-L) for L = O an d F are analyzed. The homogeneity of the array of atoms L surrounding atom M is higher in the case of fluorine compounds.