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The presence of a continuous and reversible Fm3¯m–I4/m phase transition in a polycrystalline sample of the ordered double perovskite Sr 2 LiReO 6 is described. The transition that occurs near 300°C is a consequence of in-phase tilting of the BO 6 octahedra. The temperature dependence of both the lattice parameters and the spontaneous strains are consistent with a second order...
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