On Some Structural and Spectroscopic Aspects of Rare Earth Oxycompounds

• Authors: J. Hölsä , E. Säilynoja , P. Porcher
• Languages of publication: EN

Abstracts

EN

The aim of this account is to present the use and the advantages of different experimental and theoretical methods in the study of the structural and spectroscopic properties of rare earth (RE) oxyfluorides. The structural characterization was carried out with the X-ray and neutron powder diffraction techniques combined with the analysis of the acquired data with the Rietveld profile refinement method. The detailed spectroscopic studies were also used by employing the optical absorption and luminescence as well as inelastic neutron scattering data. Simple spectroscopic measurements gave, however, only qualitative description of the spectroscopic properties studied. More sophisticated and quantitative means was obtained by the application of the phenomenological crystal field theory to the spectroscopic data. On the other hand, the structural data was also used as initial input to electrostatic point charge calculation in order to extract the spectroscopic information. The structural and spectroscopic studies comprised the verification of the exact crystal and energy level structures and the characterization of the different interactions modifying the spectroscopic properties of the RE^{3+} ions. Finally, the results from the theoretical model were used to explain the evolution of the crystal field effect on the 4f^{N} energy level structure of the RE^{3+} ion in the RE oxyfluorides series.

Keywords

EN

61.10.-i; 61.12.-q; 61.50.-f; 61.66.Fn

Discipline

• 61.66.Fn: Inorganic compounds
• 61.50.-f: Structure of bulk crystals

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 1996
• Volume: 90
• Issue: 6
• Pages: 1193-1201

Dates

published

1996-12

received

1996-06-24

Contributors

author

J. Hölsä

• University of Turku, Department of Chemistry, FIN-20014 Turku, Finland

author

E. Säilynoja

• University of Turku, Department of Chemistry, FIN-20014 Turku, Finland

author

P. Porcher

• C.N.R.S., U.P.R. 209, F-92195 Meudon, France

Identifiers

DOI

10.12693/APhysPolA.90.1193