Abstract
The presence of a continuous and reversible Fm 3 ¯ m – I4/ m phase transition in a polycrystalline sample of the ordered double perovskite Sr 2LiReO 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 phase transition as would be expected for a soft mode transition.
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