Effects of the Crystal Field in the Spectra of Iron Group Impurities in ZnSe

The many‐electron crystal field term states are calculated with account of the symmetry dependent deformation of the 3d orbitals and of the dependence of one‐electron energies on the spin orientations. It is shown that the one‐electron 3d orbitals of symmetry t 2 are extended with respect to orbitals of symmetry e by 1 to 4%. The relative deformation depends on the ratio of a σ‐type resonant integral to a π‐type resonant integral.