“…In the crystal structure of Eu doped Fe 3 O 4 along with the different Wyckoff sites occupied by the Fe and O, respectively, shows Fe 3+ cations occupying 8a sites at (1/8, 1/8, 1/8), Fe 3+ /Fe 2+ cations occupying 16d sites at (1/2, 1/2, 1/2), and oxygen anions with reference to 32e position at (u,u,u). 21,22 Moreover, from Fig. 3 (generated from VESTA) and the cation distribution from Rietveld Renement (RR), it can be visualized that Eu ions opt to be in the octahedral (B) sites rather than the tetrahedral (A) sites.…”