Abstract

The crystal structure of BaCu 2(PO 4) 2 has been determined from X-Ray single crystal data. The crystal symmetry is triclinic, space group P1̄, with unit cell constants a = 9.226(1) Å, b = 9.271(1) Å, c = 10.516(1) Å, α = 106.76(5)°, β = 101.69(5)°, and γ = 115.70(5)°. The structure was solved using 2802 independent reflections ( R = 0.0411, R w = 0.0413). The framework corresponds to isolated sheets of mixed CuO 5 and PO 4 polyhedra which are linked by the Ba 2+ cations. The copper atoms constitute isolated magnetic chains parallel to the [110] direction. The magnetic susceptibility of BaCu 2(PO 4) 2 has been interpreted in terms of a one-dimensional magnetic system.

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