Nanostructural oxide “memory” of rare earth molybdates

Abstract

The structural aspects of the acid-base interaction in the course of formation of molybdates in the binary systems Ln2O3-MoO3 have been considered. The structures of rare earth molybdates inherit infinite bands of {[LnO n ]-[LnO n ]} dimers from the structures of Ln2O3 oxides. The nanostructural oxide “memory” of molybdates implies that the dimers in these bands retain approximately nanometer sizes and predominant mutual orientation despite the fact that, as the Mo formula content increases, the types of polyhedra in the dimers change and the contacts between dimers and, eventually, between the polyhedra in these dimers are lost.