Layered oxygen vacancy ordering in Nb-doped SrCo1-xFexO3-δ perovskite
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Senne Van Rompaey
Abstract
The crystal structure of SrCo0.7Fe0.2Nb0.1O2.72 was determined using a combination of precession electron diffraction (PED), high-angle annular dark field scanning transmission electron microscopy (HAADF-STEM) and spatially resolved electron energy loss spectroscopy (STEM-EELS). The structure has a tetragonal P4/mmm symmetry with cell parameters a = b = ap, c = 2ap (ap being the cell parameter of the perovskite parent structure). Octahedral BO2 layers alternate with the anion-deficient BO1.4 layers, the different B cations are randomly distributed over both layers. The specific feature of the SrCo0.7Fe0.2Nb0.1O2.72 microstructure is a presence of extensive nanoscale twinning resulting in domains with alignment of the tetragonal c-axis along all three cubic direction of the perovskite subcell.
© by Oldenbourg Wissenschaftsverlag, München, Germany
Articles in the same Issue
- Preface
- Electron crystallography as a complement to X-ray powder diffraction techniques
- Stacking disorders in zeolites and open-frameworks – structure elucidation and analysis by electron crystallography and X-ray diffraction
- Layered oxygen vacancy ordering in Nb-doped SrCo1-xFexO3-δ perovskite
- Structure solution of oxides from zone axes precession electron diffraction data
- Aberration-corrected and energy-filtered precession electron diffraction
- Scanning reciprocal space for solving unknown structures: energy filtered diffraction tomography and rotation diffraction tomography methods
- Study of ternary complex Al—Mg—Ag intermetallides using Precession Electron Diffraction
Articles in the same Issue
- Preface
- Electron crystallography as a complement to X-ray powder diffraction techniques
- Stacking disorders in zeolites and open-frameworks – structure elucidation and analysis by electron crystallography and X-ray diffraction
- Layered oxygen vacancy ordering in Nb-doped SrCo1-xFexO3-δ perovskite
- Structure solution of oxides from zone axes precession electron diffraction data
- Aberration-corrected and energy-filtered precession electron diffraction
- Scanning reciprocal space for solving unknown structures: energy filtered diffraction tomography and rotation diffraction tomography methods
- Study of ternary complex Al—Mg—Ag intermetallides using Precession Electron Diffraction
