Effects of iron substitution and anti-site disorder on crystal structures, vibrational, optical and magnetic properties of double perovskites Sr2(Fe1−xNix)TeO6
(Fe/Ni) 2 d O 6 and (Te) 2 a O 6 , tilted in the system (a − a − c 0 ). However, the refinements have shown a complex distribution of all three cations over the two available octahedral sites; 2 d (½, ½, [...] El Bouari, James D. Eales, Paul A. Bingham and Thorsten M. Gesing Dalton Transactions (2022) https://doi.org/10.1039/D2DT02447K The double-perovskite series, Sr 2 (Fe 1− x Ni x )TeO 6 ( x = 0, 0.25, 0 [...] 25, 0.50 and 0.75 reveal the presence of Fe 3+ in high-spin state with an anti-site disorder of Fe–Ni–Te cations in distorted octahedral environments (site 2 d and 2 a ). The results show that significant