Substitutions for Bi³⁺ into (Bi₂O₂)²⁺ layers of the Aurivillius (Bi₂O₂)(A_n-1B_nO_3n+1) oxides

Taking as the starting material the Bi2SrNb2O9 Aurivillius oxide, it has been demonstrated that the Bi3+ ions in the (Bi2O2) 2+ layer can be replaced by other p-cations possessing a stereochemical active lone pair of electrons. In this way, Bi2-xSbxS rNb2O9 and Bi2-yPbySrNb2O9-y/2 solid solutions have been prepared and characterized by X-ray powder diffraction methods. Furthermore, preliminary results on the special case of Te4+ doping are also reported. © 1993.