Energies of the Electronic Configurations of the Lanthanide and Actinide Neutral Atoms

Abstract

The thermodynamic data for the lanthanide and actinide metals have been combined with spectroscopic data to develop a method of estimating the energies of the electronic configurations of the neutral gaseous atoms.Term values are tabulated for the lowest spectroscopic states of each configuration.Many of the odd terms of Lai have been reclassifi.ed. rnTRODUCTIONThe energies of the various electronic configurations of the gaseous atomf:l provide important information that can be used to fix the crystal structures and thermodynamic data for the elements and thelr compounds .. 1 ' '3Conversely, thermodynamic data.canbe used to fix the enercies of elec-.._____