Synthesis and x-ray characterization of Li0.5Mn0.25TiOAsO4 (M = Mg, Co, Ni, Zn) oxyarsenates

Mohamed Chakir (1) , Abdelaziz El Jazouli (1) , Jean-Pierre Chaminade (2)

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

Li0.5M0.25TiOAsO4 (M=Mg,Co,Ni,Zn) oxyarsenates powders were prepared by coprecipitation method from dilute solution of Li2CO3,M(NO3)2×H2O (M=Mg,Co,Ni,Zn), (NH4)H2AsO4 and TiCl4 in ethanol. The resulting powders, obtained after drying at about 60 °C, were heated progressively with intermittent grindings at 200 °C–750 °C in air. These new compounds crystallize in the monoclinic system with space group P21/c. Their parameters are functions of M2+ ion size.

Mots clés: Sol-gel processing; precipitation; Other heat and thermomechanical treatments; Solubility; segregation; and mixing; Phase separation; Structure of specific crystalline solids

Domaines: Matériaux

Mohamed Chakir, Abdelaziz El Jazouli, Jean-Pierre Chaminade. Synthesis and x-ray characterization of Li0.5Mn0.25TiOAsO4 (M = Mg, Co, Ni, Zn) oxyarsenates. Powder Diffraction, 2006, vol. 21, n° 3, p. 229-235. ⟨10.1154/1.2183323⟩. ⟨hal-00096832⟩