The electronic structure of the CoCl42- ion analyzed by means of visible spectroscopy, X-ray photoelectron spectroscopy (XPS) and electron energy loss spectroscopy (EELS)

Further measurements on single crystals of Cs2CoCl3 and Cs3CoCl5 to enlarge the knowledge of the electronic structure of the CoCl42- ion are presented. In the visible region, the spectra show better definition of the spin-forbidden band distribution arising from the two Ti quartet terms F-4 and P-4. Besides, measurements with X-ray photoelectron spectroscopy (XPS) and electron energy loss spectroscopy (EELS) allow one to (a) trace (in XPS) the density-of-states (DOS) of the valence orbitals and measure the first interband transitions as satellites near the main Co2p(3/2) peak; and (b) identify other interband transitions and several plasmons in EELS.