Abstract
This paper shows the influence of ionicity on the eσ and eπ antibonding effects in some Eu3+ doped compounds: KY3F10, LaCl3 and YMO4 (M=P,As,V).
In the ligand field approximation, the eσ and eπ parameters are determined for each kind of ligands, using the angular overlap model of Jørgensen. The obtained eσ and eπ must not only fit the crystal field energy values expressed in terms of experimental B mn (deduced from fluorescence spectra) but also each B mn .
It is observed that the importance of the π effects (compared to the σ effects) increases with ionicity for all the Eu3+ doped compounds whatever the ligand may be. Moreover, the contribution of the π effects increases appreciably as Eu3+ is replaced by Er3+.
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© 1980 Plenum Press, New York
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Gaume, F., Linarès, C., Louat, A., Blanchard, M. (1980). The Trend of the Eu3+ - Ligand Bonding in Covalent and Ionic Rare-Earth Compounds. In: McCarthy, G.J., Rhyne, J.J., Silber, H.B. (eds) The Rare Earths in Modern Science and Technology. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-3054-7_14
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DOI: https://doi.org/10.1007/978-1-4613-3054-7_14
Publisher Name: Springer, Boston, MA
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