3d electron transitions in Co- and Ni-doped MgSO3·6H2O

Abstract

Absorption spectra of magnesium sulfite hexahydrate (MgSO3·6H2O), doped with Co and Ni, have been studied in the spectral region 1.46–3.1 eV. Investigations have been carried out with linear polarized light E‖c, E⊥c (c is the optical axis of MgSO3·6H2O) that propagates in the (1210) direction. The Co structure manifests in the spectral region 2.06–3.1 eV and the Ni structures manifest in the spectral region 1.46–2.26 eV. The peculiarities of the Jahn–Teller effect and spin–orbit interaction with respect to the impurity ions in the crystal lattice of MgSO3·6H2O are analyzed and discussed. The electron transitions in Co2+ and Ni2+ ions are determined for E‖c, E⊥c. The crystal field parameter Dq and Racah parameters B and C are also calculated.