Hartree-Fock cluster calculations were performed of cross luminescence
(CRL) in CdF2. Results are compared with earlier results on BaF2. Alt
ernative calculations were done on levels and transition rates using a
band structure model. From a comparison of the two cases a possible e
xplanation is given of the fact that CRL in CdF2, presumably in the vi
sible wavelength region, is difficult to detect.