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Single crystals of K3Cu2O4 were prepared by the azide/nitrate route from respective stoichiometric mixtures of KN3, KNO3 and CuO, at 923 K, whereas powder samples were synthesised by solid state reaction of K2O, KCuO2 and CuO, sealed in gold ampoules and treated at 723 K. According to the single crystal structure analysis (Cmcm, Z = 4, a = 6.1234(1), b = 8.9826(2), c = 10.8620(2) Å, R1 = 0.044, R2...
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