Electronegativity, Charge Transfer, Crystal Field Strength, and the Point Charge Model Revisited
文摘
Although the optical spectra of LnCl63鈥?/sup> systems are complex, only two crystal field parameters, B40 and B60, are required to model the J-multiplet crystal field splittings in octahedral symmetry. It is found that these parameters exhibit R鈥? and R鈥? dependence, respectively, upon the ionic radius Ln3+(VI), but not upon the Ln鈥揅l distance. More generally, the crystal field strengths of LnX6 systems (X = Br, Cl, F, O) exhibit linear relationships with ligand electronegativity, charge transfer energy, and fractional ionic character of the Ln鈥揦 bond.