STRUCTURE AND IONIZATION-POTENTIALS OF CLUSTERS CONTAINING HEAVY-ELEMENTS .2. HOMONUCLEAR GROUP-VI CLUSTERS UP TO HEXAMERS

As in earlier investigations on group V clusters, homonuclear clusters X(m) of heavy group VI atoms (X = Se, Te) up to m = 6 have been studi ed with valence ab initio self consistent field/configuration integrat ion calculations using energy-adjusted pseudopotentials. Several struc tures have been investigated and results are given for bond lengths (R (e)), atomization energies (D(e)) and vertical ionization potentials o f the ground states. Comparison with experimental and other theoretica l values is made where possible, and differences from the correspondin g group V clusters are discussed.