EPR and optical studies of vanadyl ion in magnesium thallium sulphate hexahydrate

Abstract Results of EPR and optical studies of vanadyl ion (VO 2+ ) doped in magnesium thallium sulphate hexahydrate are reported. The spin-Hamiltonian parameters are determined from the powder EPR spectra at room temperature. The optical absorption spectra at room and liquid nitrogen temperatures have also been studied. By correlating the EPR and optical spectral data, the molecular orbital bonding parameters have been evaluated.