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008ChemInform Abstract Single crystals of the title compound are grown from equimolar mixtures of Na2O and NaCl at 873 K. Na3OCl crystallizes in the cubic space group Pm3m with Z=1. The single-crystal XRD data confirm that the compound has a perovskite-type structure as previously concluded from powder XRD.

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The colourless compounds KLiSe and KNaSe have been prepared and characterized by powder measurements. KLiSe crystallizes in a tetragonal lattice with a — 451.7(1), c = 7274 1(2) pm, Z. = 2 (P4/nmm). KNaSe crystallizes in the orthorhombic space group Pnma with a = 806.3(2), b = 481.7(1) and c = 865.1(2) pm, Z = 4.