Fig. 4

Dislocation defects observed during the oxidative dissolution of magnetite. a A dislocation loop formed after 1 min reaction in 0.1 M HCl solution of the octahedron-shaped magnetite crystal shown in Fig. 2 with cross-sectional views at the dashed line box showing b displacement and c strain. d A linear dislocation defect formed after 4 min reaction in 0.1 M HCl solution in the magnetite crystal shown in Supplementary Fig. 8 with cross-sectional views at the dashed line box showing e displacement and f strain. Scale bar, 100 nm