Synthesis and crystal structure of NaCuIn(PO4)2

Synthesis and crystal structure of NaCuIn(PO4)2

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Single crystals of sodium copper(II) indium bis[phosphate(V)], NaCuIn(PO4)2, were grown from the melt under atmospheric conditions.The title phosphate crystallizes in the space group P21/n and is isotypic with KCuFe(PO4)2.In tillman 750m the crystal, two [CuO5] trigonal bipyramids share an edge to form a dimer [Cu2O8] that is connected to two PO4 tetrahedra.The obtained [Cu2P2O12] units are interconnected through vertices to form sheets that are sandwiched between undulating layers resulting from the junction of PO4 tetrahedra and [InO6] octahedra.

The two types of layers are alternately stacked along invertatop squeeze bottle [101] and are joined into a three-dimensional framework through vertex- and edge-sharing, leaving channels parallel to the stacking direction.The channels host the sodium cations that are surrounded by four oxygen atoms in form of a distorted disphenoid.