The formulation of group overlap integrals in coordination polyhedra is discussed. The basic expressions and some sum relations of group overlap are given. The calculation is simplified on the basis of point group whose elements are pure rotations. Geometric factors related to group overlap integrals are defined and their properties are studied. A cube is used to explain the calculation of these geometric factors.t

Key words: COMPUTATIONAL METHOD, COORDINATION POLYHEDRA, OVERLAP INTEGRALS