Low Temperature Absorption Spectrum of LiNiPO4

Autor:	R. Cammi, A. Belletti, R. Borromei, Enrico Cavalli
Rok vydání:	1991
Předmět:	chemistry.chemical_classification Ligand field theory Absorption spectroscopy chemistry Stereochemistry Physical chemistry Infrared spectroscopy Condensed Matter Physics Inorganic compound Electronic Optical and Magnetic Materials
Zdroj:	physica status solidi (b). 163:281-292
ISSN:	1521-3951 0370-1972
DOI:	10.1002/pssb.2221630128
Popis:	The polarized absorption spectrum of LiNiPO4 crystals is investigated in the range 5000 to 25000 cm−1 at 9 K. The splitting and intensities of the bands in different polarizations are interpreted mainly in terms of a C2v perturbation of the octahedral site. The energies of the transitions are reproduced by means of a ligand field calculation, in which only a Oh C2v site perturbation is considered, assumed as preponderant in the symmetry descent Oh C2v Cs. Le spectre d'absorption polarise des cristaux de LiNiPO4 a ete etudie a 9 K dans l'interval 5000 a 25000 cm−1. La separation et l'intensite des bandes dans differentes polarisations ont ete interpretees en termes d'une perturbation C2v du site octahedrique. les energies des transitions ont ete reproduites par le moyen d'un calcul du champ des liantes, en tenant compt d'une plus grande contribution Oh C2v dans le descente de symetrie Oh C2v Cs.
Databáze:	OpenAIRE
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