Abstract

In this paper, the symmetrized vibronic crystal field-ligand polarization method is reviewed on a critical basis. A general formalism is put forward, and it is applied with reference to the \(3)H(4)A(1)>c<--->\(H6T2)-H-3-T-b> electronic transition of the Cs2ZrBr6:UB62- system. The calculation of the vibronic intensities associated with the three false origins nu(3)(tau(1u)), nu(4)(tau(1u)) and nu(6)(tau(2u)) is carried out, assuming that the coupling among the internal and the external vibartions is small enough to be neglected. Though, the simplicity of our model calñculation a fair agreement with experiment is found.