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The Absorption Spectrum of Manganate (VI) in BaSO 4 . A Reinterpretation
Author(s) -
Borromei R.,
Oleari L.,
Day P.
Publication year - 1984
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221240230
Subject(s) - excited state , chemistry , absorption spectroscopy , spectral line , manganate , ligand field theory , lattice (music) , atomic physics , doping , molecular physics , ion , condensed matter physics , physics , power (physics) , battery (electricity) , quantum mechanics , acoustics , organic chemistry , astronomy
The polarised electronic spectrum of MnO 2− 4 doped in crystals of BaSO 4 is re‐interpreted by making a detailed comparison with the corresponding spectra in the host lattices M 2 SO 4 (M K, Rb, Cs) and K 2 CrO 4 . All bands above 16500 cm −1 arise from charge transfer transitions while the part of the spectrum below 16500 cm −1 is due to theligand field transition e → 2t 2 . Moreover in BaSO 4 the ligand field excited state 2 T 2 (e → 2t 2 ) undergoes a large splitting due to the site perturbation in contrast to K 2 SO 4 in which the splitting is very small. The energies of the charge transfer excited states are only slightly affected by the changeof host lattice. With the new assignments all the ligand field and charge transfer spectra of the d 1 tetroxo‐anions MnO 2− and CrO 3− 4 can be interpreted in terms of a common scheme.