http://dspace.univ-setif.dz:8888/jspui/handle/123456789/337 Synthèse et étude structurale d’une nouvelle phase (1-x)BiO1.5-(x/4)Ta2Te2O9 (x=0.1, 0.2), TYPE δ-Bi2O3 2026-05-04T15:15:54Z http://dspace.univ-setif.dz:8888/jspui/handle/123456789/338 Titre: Synthèse et étude structurale d’une nouvelle phase (1-x)BiO1.5-(x/4)Ta2Te2O9 (x=0.1, 0.2), TYPE δ-Bi2O3 Auteur(s): Loubbidi, L.; Chagraoui, A.; Orayech, B.; Naji, M.; Tairi, A.; Moussaoui, A.; Ait Sidi Ahmed, O.; Yakine, I.; Igartua, J.M. Résumé: Two compositions (1-x)BiO 1.5-(x/4)Ta2 Te 2O9 with (x=0.1, 0.2) were taken within Bi2O3-Ta 2O5-TeO 2 system. X ray diffraction analysis shows that they are isotypes δ-Bi2O3 phase. The pattern refinement of the composition (x=0.2) was carried out by means of the Rietveld using the FULLPROF program [1]. It crystallizes in the cubic unit cell, space group Fm-3m and a lattice parameter a = 10.49 Å. The reliability factors are RF = 2.275% and RB = 3.033%. 2015-01-01T00:00:00Z