Crystal lattice effects on the electronic spectrum of the manganate ion
Abstract
The polarised electronic spectra of MnO42– doped into crystals of Rb2SO4, Cs2SO4, and K2CrO4 have been recorded at 4·2 K in the range 10 000–40 000 cm–1. The different polarisation behaviour of the low-symmetry components of the 2T2 terms derived from the ligand-field and charge-transfer configurations is ascribed to differences in the magnitude of the spin-orbit interaction in the two types of configuration. From an analysis of the phonon sidebands in the ligand-field spectrum, comments are made about the phonon spectra of the host lattices. Shifts in the ligand-field and charge-transfer origins on changing the host lattice are also discussed.