Abstract
A new cobalt phosphate Cs2Co3(HPO4)(PO4)2·H2O 1, has been synthesized by hydrothermal reactions and characterized by single-crystal X-ray diffraction, thermogravimetric analysis, and magnetic techniques. It crystallizes in the monoclinic space group P21 with a=10.4711 (6) Å, b=5.1129 (3) Å, c=13.5584 (8) Å, β=109.893 (1)°, V=682.57 Å3, Z=2. Refinement gave R1=0.0226, wR2=0.0583 for 2611 unique observed reflections (I>2σ(I)). The cobalt and phosphorus atoms in 1 are tetrahedrally coordinated by oxygen atoms with Co to P ratio of 1. The framework structure of 1 is built up by sharing corners of [Co(PO4)]2 layers and [Co(HPO4)] double zigzag chains, which contains infinite 1-D tunnels, with 16-membered ring channels housing caesium cations and water molecules. Magnetic susceptibility measurements showed that 1 has a canted antiferromagnetic interaction at a transition temperature of about 10 K.
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