A copper uranyl monophosphate built up from [CuO2]infinity chains: Cu2UO2(PO4)(2)

摘要

A copper uranyl monophosphate, Cu2UO2(PO4)(2), has been synthesized for the first time. It crystallizes in the space group C2/m with a = 14.040(1) Angstrom, b = 5.7595(4) Angstrom, c = 5.0278(5) Angstrom and beta = 107.24(1)degrees. Its original structure consists of [CuO2](infinity) puckered chains of edge-sharing CuO4 groups running along b, interconnected with [UP2O10](infinity) ribbons. The coordination of uranium is characteristic of the [UO2](2+) uranyl ion, forming flattened UO6 octahedra, whereas the planar CuO4 groups exhibit a rectangular configuration. This compound shows original antiferromagnetic interactions at low temperature, due to the presence of [CUO2](infinity) chains, but the latter are more complex than those of 1-D spin (1)/(2) chains. (C) 2002 Elsevier Science (USA). [References: 28]