Synthesis, structure and characterisation of Fe0.50Ti2(PO4)3: A new material with Nasicon-like structure

Saïd Benmokhtar (1) , Abdelaziz El Jazouli (1) , A. Aatiq (1) , Jean-Pierre Chaminade (2) , Pierre Gravereau (2) , Alain Wattiaux (2) , Léopold Fournès (2) , Jean-Claude Grenier (2)

1 Laboratoire de Chimie des Matériaux Solides
2 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux

A new iron titanyl phosphate Fe0.50Ti2(PO4)3 was synthesized by both solid-state reaction and Cu2+–Fe2+ ion exchange method. The material was then characterized by X-ray diffraction, Mössbauer, magnetic susceptibility measurements and optical absorption. The crystal structure of the compound was refined, using X-ray powder diffraction data, by the Rietveld profile method; it crystallizes in the rhombohedral system, space group Click to view the MathML source, with a=8.511(1) Å and c=20.985(3) Å, V=1316.45(3) Å3 and Z=6. The structure, which is compared to that of Mn0.50Ti2(PO4)3 is built up from [TiO6] octahedra and [PO4] tetrahedra which are linked by corner sharing along the c-axis. Fe2+ cations are located in half of the antiprism MI sites and are orderly distributed with vacancies within the two possible positions of the MI sites of ...

Mots clés: Synthesis; Phosphate; Nasicon; X-ray diffraction; Mössbauer spectroscopy; Magnetic measurements; UV–visible

Domaines: Matériaux

Saïd Benmokhtar, Abdelaziz El Jazouli, A. Aatiq, Jean-Pierre Chaminade, Pierre Gravereau, et al.. Synthesis, structure and characterisation of Fe0.50Ti2(PO4)3: A new material with Nasicon-like structure. Journal of Solid State Chemistry, 2007, 180 (7), pp.2004-2012. ⟨10.1016/j.jssc.2007.04.014⟩. ⟨hal-00187799⟩