Synthesis and crystal structure of AgCuVO4

Abstract

Dark red single crystals of AgCuVO4 were obtained from hydroxide fluxes in Ag-containers at 430°C. According to X-ray diffraction data AgCuVO4 crystallizes in the orthorhombic space group Pnma (Z = 4, a = 925.5(1) pm, b = 677.8(1) pm, c = 540.1(1) pm, wR2 = 0.0753). The Pearson code (oP28) and Wyckoff sequence (dc4a) indicate that AgCuVO4 is related to the olivine-type of structure, but the first coordination sphere of AgI and CuII differ significantly from the C.N. 6 with irregular square-pyramidal [AgO5] polyhedra and distorted square-planar [CuO4] units. These differences in crystal chemistry are discussed and MAPLE as well as ECoN values are given. © 2008 Wiley-VCH Verlag GmbH & Co. KGaA.