fig4
![Review on Fe-based double perovskite cathode materials for solid oxide fuel cells](https://image.oaes.cc/b54869a0-2568-4d4e-99ef-eb92b43517f2/em4070.fig.4.jpg)
Figure 4. Structure characteristics of different perovskites: (A) Cubic crystal structure of ABO3 perovskite (Reproduced from[5], copyright of Progress in Chemistry, 2022). (B) Cubic crystal structure of B-site double perovskite A2BB’O6 (Reproduced from[5], copyright of Progress in Chemistry, 2022). (C) Cubic crystal structure of A-site double perovskite AA’B2O6. (D) Tetragonal crystal structure of A-site double perovskite AA’B2O5.