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Figure 1
Schematic representation of the BiFeO3 unit cell shown in the hexagonal setting of the space group R3c. The Bi3+, Fe3+ and O2- ions are represented by atomic displacement ellipsoids of red, white and grey, respectively. The long and short Fe—O bonds are shown in blue and orange colours, respectively. The short and long Bi—Fe distances, l1 and l2 (see text) are shown. |