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Local Structure of Rare Earth Niobates (RE 3 NbO 7 , RE = Y, Er, Yb, Lu) for Proton Conduction Applications ▴
Author(s) -
LópezConesa L.,
Rebled J. M.,
Chambrier M. H.,
Boulahya K.,
GonzálezCalbet J. M.,
Braida M. D.,
Dezanneau G.,
Estradé S.,
Peiró F.
Publication year - 2013
Publication title -
fuel cells
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.485
H-Index - 69
eISSN - 1615-6854
pISSN - 1615-6846
DOI - 10.1002/fuce.201200136
Subject(s) - high resolution transmission electron microscopy , selected area diffraction , fluorite , pyrochlore , electron diffraction , crystallography , natural bond orbital , materials science , transmission electron microscopy , chemistry , diffraction , phase (matter) , physics , nanotechnology , optics , organic chemistry , metallurgy , density functional theory , computational chemistry
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 electron microscopy (HRTEM). SAED patterns show diffuse scattering features along the [111] direction of the pure fluorite ( Fm–3m ) structure due to a short‐range ordering of anion vacancies in the fluorite structure or the change of coordination number around some cations. The latter is related to the presence of small domains of pyrochlore phase (Fd‐3m), which are observed in the HRTEM images.