http://dspace.univ-setif.dz:8888/jspui/handle/123456789/341 2026-05-30T19:25:30Z http://dspace.univ-setif.dz:8888/jspui/handle/123456789/342 Titre: Chemical preparation crystallographic characterization and vibrational study of two new condensed phosphates Auteur(s): Tridane, M.; Kheireddine, A.; Fahim, I.; Moutaabbid, H.; Moutaabbid, M.; EL. M. Tace; Charaf, A.; Radid, M.; Salhamen, F.; Benmokhtar, S.; Belaaouad, S. Résumé: Chemical preparation, crystallographic characterization and vibrational studies are reported for two new condensed phosphates associated to nickel-rubidium NiRb4(P3O9)2 and strontium-thallium SrTl4(P3O9)2. SrTl4(P3O9)2 was prepared by the method of ion-exchange resin and NiRb4(P3O9)2 was obtained by total thermal dehydration of NiRb4(P3O9)2.6H2O. SrTl4(P3O9)2 is rhombhoedral , Z = 2, space group P-31c, with the following unit-cell parameters : a = 7,424(1) Å, c = 20,176(2) Å and V = 2807.46(2) (Å 3 ). NiRb4(P3O9)2 is triclinic, Z = 2, space group P-1, with the following unit-cell parameters : a = 8,046(9) Å , b = 9,733(0) Å, c = 4,327(5) Å, α = 98.053°, β = 88.616°, γ = 84.761° and V = 333,95(2) (Å 3). Vibrational study is also reported for the title compounds. 2015-01-01T00:00:00Z