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Optical Properties of CrO 42− Ion in Orthorhombic Sulphates
Date Issued
01-01-1973
Author(s)
Radhakrishna, S.
Pande, K. P.
Abstract
Vibrational frequencies of CrO 42− ion embedded in orthorhombic sulphates have been determined from optical and infrared absorption studies. In the optical absorption spectra, the electronic levels are found to have a superposed vibration structure, in the regions 2300 to 2750 Á and 3300 to 3850 Á, with alternate strong and weak lines. The set of strong lines is interpreted to be due to the transitions from the ground electronic state to the vibrational levels of the excited state, whereas the set of weaker lines is assigned to the transitions from one of the vibrational levels of the ground electronic state to the vibrational levels of the upper excited electronic state. It is found that the IR forbidden bands become allowed and are observed in these lattices. No splitting is observed in the degenerate modes in IR spectra. Copyright © 1973 WILEY‐VCH Verlag GmbH & Co. KGaA
Volume
55