Local Structure of Rare Earth Niobates (RE3NbO7, RE = Y, Er, Yb, Lu) for Proton Conduction Applications▴

• DOI: 10.1002/fuce.201200136
• Publication Date: 2012-11-08T11:36:39Z
• Authors: L. López‐Conesa; J. M. Rebled; M. H. Chambrier; K. Boulahya; J. M. González‐Ca...; M. D. Braida; G. Dezanneau; S. Estradé; F. Peiró
• Keywords: Selected area diffraction; Fluorite; Natural bond orbital

Abstract Structural properties of rare earth niobates (RE 3 NbO 7 , RE = Y, Er, Yb, Lu) have been studied using selected area electron diffraction (SAED) and high resolution transmission microscopy (HRTEM). SAED patterns show diffuse scattering features along the [111] direction pure fluorite ( Fm–3m ) structure due to a short‐range ordering anion vacancies in or change coordination number around some cations. The latter is related presence small domains pyrochlore phase (Fd‐3m), which are observed HRTEM images.