
Types of ordering in perovskites with two different B-site cations. (a) Ideal rock-salt ordering; (b) partial rock-salt ordering with local disorder, called antisite (back rectangle) and anti-phase boundary defects (red rectangle); (c) complete disorder. B \mathrm{O}_{6} octahedra: blue; B^{\prime} \mathrm{O}_{6} octahedra: grey; A / A^{\prime}-site cations: green spheres; oxygen: red spheres.
auto-cropped from the OCR Markdown crop box (stage B); materials and kind to be reviewed in Phase 1