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Infrared absorption of SeO 3 2− and SeO 4 2− impurity ions in KCl and KBr crystals
Author(s) -
Demyakekko V. P.,
Tsyashchenko Yu. P.,
Verlan E. M.
Publication year - 1971
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.2220480232
Subject(s) - infrared spectroscopy , ion , impurity , infrared , absorption (acoustics) , analytical chemistry (journal) , absorption spectroscopy , chemistry , doping , spectral line , isotropy , crystallography , tetrahedral symmetry , materials science , optics , physics , optoelectronics , organic chemistry , chromatography , astronomy , mechanics , composite material , rotational symmetry
In the temperature range 120 to 300 °K a study has been made of the infrared absorption spectra of KCl and KBr single crystals doped with SeO 3 2−and SeO 4 2−anions. It is shown that the SeO 4 2−anions in these matrices form complexes SeO 4 2−· M 2+ of symmetry C 2V , with cations M 2+ (M 2+ – Ca 2+ , Sr 2+ , Ba 2+ ) similar to the complexes SeO 4 2−· M 2+ and CrO 4 2−· M 2+ observed earlier. A lowering of the local symmetry results in the splitting of V 3 (F) vibration of the tetrahedral anion SeO 4 2− . An identification of bands and their fine structure assumed to be isotropic was made in the infrared absorption spectra of the complex SeO 4 2−· M 2+ . The existence of similar complexes SeO 4 2−· M 2+ was assumed in KBr and KCI lattices doped with SeO 3 2−in connection with the quartet structure of infrared absorption spectra in the vibration region V 3 (E) of the SeO 4 2−anion.
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