Confirmation de l'existence de differents types de liaisons dans La2O3 par la R.P.E. de Mn2+

Bouysset, C.; Escribe, C.; Bacquet, G.; Dugas, J.; Sibieude, F.

doi:10.1016/0025-5408(76)90216-6

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1976

1980

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Cited by 6 publications

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“…lb) the structure is formed of a succession of slabs of a complex cation (LaO)£ consisting of OLa 4 tetrahedra edge-linked in a manner derived from the CaF 2 structure, separated by planes of oxygen anions [1]. This model implies a certain amount of covalent bonding inside the complex cation and the results of our previous experiments on Mn 2+ doped La 2 0 3 [2] are in good agreement with such considerations.…”

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confidence: 58%

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E. S. R. OF Gd³⁺ IN La₂O₃ AND ITS SOLID SOLUTIONS WITH CeO₂

Bacquet

Bouysset

Hernández³

1976

J. Phys. Colloques

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Les spectres de RPE des ions Gd3+ présents à l'état de traces dans La 2 0 3 et (La2O 3 )i-^-(Ce02)i sont caractéristiques d'une symétrie axiale suivant l'axe < 111 > et correspondent à un clivage en champ nul très important (~ 1,61 cm-'). L'addition d'oxyde de cénum crée des distorsions aléatoires de la symétrie axiale. Par rapport aux spectres enregistres avec La 2 0 3 , cela se traduit par un fort élargissement de certaines raies de résonance.

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“…The single crystals used in our experiments were obtained by one of us (D. Hernandez) with a solar furnace of the Laboratoire des Ultrartfractaires at Odeillo (France) using a slow cooling procedure, as described in [2]. They were conserved in quartz tubes sealed under vacuum to be preserved from moisture.…”

Section: Experiments and Resultsmentioning

confidence: 99%