Abstract
We have calculated the generalized cohesive energies for Ce-systems, using a full-potential linear muffin-tin orbital method and a generalized gradient-corrected density functional. Together with atomic coupling energies for cerium, the generalized cohesive energies are used to study the valence configuration degeneracy in CeA1 2 and CeX ( X = N, P, As, Sb, Bi). We find that in all these systems, the f 1 and f 0 configurations are far from being degenerate.
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