Correction: In situ study of strontium segregation in La0.6Sr0.4Co0.2Fe0.8O3- δin ambient atmospheres using high-temperature environmental scanning electron microscopy (J. Mater. Chem. A (2018) DOI: 10.1039/c8ta01341a) - Niania, M; Podor, R; Britton, TB; Li, C; Cooper, SJ; Svetkov, N; Skinner, S; Kilner, J (Journal of Materials Chemistry A, 2018)