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The Electronic Spectrum of the CrO 4 3− Ion in the Ca 2 SiO 4 · CaCl 2 Host Lattice
Author(s) -
Borromei R.
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.2221250140
Subject(s) - excited state , ion , ground state , ligand field theory , lattice (music) , absorption spectroscopy , atomic physics , chromium , materials science , crystallography , condensed matter physics , chemistry , physics , optics , organic chemistry , acoustics , metallurgy
The polarised absorption spectrum of single crystals of Ca 2 SiO 4 · CaCl 2 containing chromium as CrO 4 3−or CrO 4 4−is measured at 4.2 K in the range 8000 to 46000 cm −1 . By a careful analysis based on a T d → D 2d site symmetry perturbation and on the band polarisation behaviour, it is concluded that the observed spectrum is due to CrO 4 3− , the ground state is 2 E z 2and the system of bands in the region 10000 to 20000 cm −1 corresponds to the ligand field transition. Moreover all the observed bands except that at 37730 cm −1 correspond to a 2 T 2 excited state.