Low-temperature flux synthesis of a novel one-dimensional copper (II) chlorophosphate: crystal structure and magnetic property of Na3[CuO(HPO4)Cl]

A novel one-dimensional copper (II) chlorophosphate, Na3[CuO(HPO4)Cl] has been prepared by using the low-temperature flux method. It crystallizes in the orthorhombic system, space group Pnma, a=11.096(2), b=6.5703(13) and c=8.3623(17)Å, V=609.7(2)Å3, Z=4. Its crystal structure presents a one-dimensional character in such a way that the edge-sharing CuO4Cl2 building blocks yield a novel linear octahedral chains via Cu-O-Cu and Cu-Cl-Cu bridges. The HPO4 groups, as the modifier, are grafted onto these chains and sodium ions are located between the chains to satisfy the charge balance. The magnetic susceptibility obeys a Curie-Weiss law above 120 K with C=0.38 (emu K)/mol and Θ=-150K, showing the Cu2+ character and antiferromagnetic interactions.