Abstract
The ENDOR technique has been used to investigate the electron distribution in CsCdF3 crystals containing Mn2+, Ni2+ and Co2+. The bond structure is of the form M2+-F--Cd2+, where M stands for Mn, Ni or Co, and the measured isotropic 111Cd and 113Cd hyperfine interaction is taken to be proportional to the unpaired spin fraction, fsigma , in 2psigma orbitals on F-. The results suggest that for the Mn2+-F- bond fsigma =4.3%, which is much larger than estimates from neutron scattering data though in reasonable agreement with work by Rinneberg and Shirley (1973, 1976) who used a method involving perturbed angular correlation of gamma -rays from 111mCd.