Intraconfigurational absorption and magnetic circular dichroism spectra of Os⁴⁺ in Cs₂ZrCl₆ and in Cs₂ZrBr₆

Abstract

Electronic d-d transitions within the t _2g ⁴ configuration of Os⁴⁺ doped into cubic crystals of Cs₂ZrCl₆ and Cs₂ZrBr₆ were studied by means of low temperature absorption and magnetic circular dichroism (MCD) spectroscopy. The direct observation of the complete manifold of states in both host systems is reported and leads to a reinterpretation of earlier work. Vibronic analysis and MCD allow assignment of all the electronic origins of this configuration. Their energies are compared to results of a ligand field calculation.