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Free keywords:
Copper; Cuprates; Azide nitrate route; Crystal structure; Raman spectroscopy
Abstract:
Air and moisture sensitive K(5)[CuO(2)][CO(3)] was prepared via the azide/nitrate route from stoichiometric mixtures of the precursors CuO, KN(3), KNO(3) and K(2)CO(3). According to the single-crystal X-ray analysis of the crystal structure [P4/nbm, Z = 2, a = 7.4067(5), c = 8.8764(8) angstrom, R(1) = 0.053, 433 independent reflections] K(5)[CuO(2)][CO(3)] represents an ordered superstructure of Na(5)[NiO(2)][CO(3)]. The structure contains isolated [CuO(2)](3-) dumbbells and CO(3)(2-) anions, with the latter not connected to the transition element. Raman spectroscopic measurements confirm the presence of CO(3)(2-) in the structure.
