Fully relativistic calculations of ThF_4

摘要

Based on the results of first-principles density functional theory calculations of the electronic structure of ThF_4 in solid state and molecular form, the study of the Th6p, 5f, 6d, 7s and F2s, 2p states was done. We used the fully relativistic cluster discrete variational method with the local exchange-correlation potential. The hybridization of F2p and Th5f, 6d, 7s, 7p states in the valence molecular orbitals (VMOs) in the region 0-10 eV and of F2s and Th6p states in the inner valence molecular orbitals (IVMOs) in the region 10-50 eV was studied. The results of relativistic cluster calculations are compared with those obtained for ThF4 molecule. The energies of ionization of VMOs and of IVMOs were evaluated on the basis of the ground-state and Slater's transition-state calculations. The MO energy levels provide a satisfactory interpretation of experimental photoelectron spectra.