Bi2n+4MonO6(n+1) with n=3, 4, 5, 6: A new series of low-temperature stable phases in the mBi2O3 – MoO3 system (1.0<m<1.7): Structural relationships and conductor properties

Four low-temperature phases with compositions Bi10Mo3O24, Bi6Mo2O15, Bi14Mo5O36 and Bi8Mo3O21 have been prepared by the n-butylamine wet synthesis method. They have been characterized by powder X-ray diffraction and transmission electron microscopy, mainly by selected area electron diffraction. The four phases present a close structural relationship and a common basic fluorite-type structure and are members of a homologous series of phases with general formula Bi2n+4MonO6(n+1), being n=3, 4, 5 and 6, respectively. The matrices relating their superstructures and the basic fluorite type unit cell are given, as well as a general one for the whole series. The conductor behavior of these phases is characterized by impedance spectroscopy being all these materials very good ionic conductors.

Four new phases Bi10Mo3O24, Bi6Mo2O15, Bi14Mo5O36 and Bi8Mo3O21 have been synthesized, characterized and described as consecutive members of a new family Bi2n+4MonO6(n+1), with n=3, 4, 5 and 6. They are based on basic fluorite-type structure and their unit cells are depicted in the accompanying graphic.Figure optionsDownload as PowerPoint slide