[en] Analysis of crystallostructural role of 93 types of U(3 -U(6) atoms, incorporated into coordinated UO_nCl_m polyhedron composition is conducted using Voronoi-Dirichlet polyhedra (VDP). It is ascertained, that without using any crystallochemical radii, the VDP allow one to ascertain the value of coordinated numbers of uranium atoms and composition of their coordination area. Taking UO_nCl_m complexes as are example it is shown, that a series of VDP characteristics can be successfully used as quantitative parameters, allowing one to describe and analyse the specific nature of local environment of complexing atoms in the structure of inorganic and coordination compounds