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The synthesis, and crystal and magnetic structure of the iron selenide BaFe<sub>2</sub>Se<sub>3</sub>with possible superconductivity at<i>T</i><sub>c</sub>= 11 K
We report on synthesis of single crystals of BaFe2Se3 and study of their crystal and magnetic structures by means of synchrotron single crystal X-ray and neutron powder diffraction. The crystal structure has orthorhombic symmetry and consists of double chains of FeSe4 edge connected tetrahedra intercalated by barium. Below 240 K …