Rose-Noëlle Vannier

Chemical, structural and electrical characterizations in the BIZNVOX family

The BIZNVOX solid solution domain, stable at room temperature, nhas been determined. α-, β- and γ-type compounds can be stabilized ndepending on the x and y values of the general Bi2(V1xa0−xa0xxa0−xa0yZnxBiy)Oz nformula. The α- and β-type phases exhibit incommensurate modulations nstudied by X-ray powder diffraction. The lock-in of their wave vectors non the three-fold and two-fold superstructures of the undoped α- nand β-Bi4V2O11, respectively, is clearly nevidenced. SAEDand HREM observations reveal very complex disorder correlated nwith the attractive oxide ion conductivity of these materials.