ELECTROSTATIC INTERACTIONS IN SOLID C-60

The electrostatic intermolecular interactions in solid C60 are studied in the framework of an electrical multipole expansion. Representations of the charge distribution in terms of elementary charges located at high-symmetry sites axe discussed, and the contribution of each of these to the multipoles is given. The relationship of the elements of the multipolar tensor to the molecular symmetry adapted functions of order l up to 16 are listed. It is found that multipolar interactions of order 22, and, therefore, multipoles of l = 16, are necessary to assure the convergence of the interaction energy.