Chippindale Ann M, Sharma Arun V, Hibble Simon J
Department of Chemistry, University of Reading, Whiteknights, Reading, Berks RG6 6AD, England.
Acta Crystallogr Sect E Struct Rep Online. 2009 Apr 30;65(Pt 5):i38-i39. doi: 10.1107/S1600536809015438.
The title compound, potassium nickel(II) digallium tris-(phosphate) dihydrate, K[NiGa(2)(PO(4))(3)(H(2)O)(2)], was synthesized hydro-thermally. The structure is constructed from distorted trans-NiO(4)(H(2)O)(2) octa-hedra linked through vertices and edges to GaO(5) trigonal bipyramids and PO(4) tetra-hedra, forming a three-dimensional framework of formula NiGa(2)(PO(4))(3)(H(2)O)(2). The K, Ni and one P atom lie on special positions (Wyckoff position 4e, site symmetry 2). There are two sets of channels within the framework, one running parallel to the [10] direction and the other parallel to [001]. These inter-sect, forming a three-dimensional pore network in which the water mol-ecules coordinated to the Ni atoms and the K(+) ions required to charge balance the framework reside. The K(+) ions lie in a highly distorted environment surrounded by ten O atoms, six of which are closer than 3.1Å. The coordinated water mol-ecules are within hydrogen-bonding distance to O atoms of bridging Ga-O-P groups.
标题化合物三水合二镓三（磷酸）镍（II）酸钾，K[NiGa₂(PO₄)₃(H₂O)₂]，通过水热法合成。该结构由扭曲的反式NiO₄(H₂O)₂八面体通过顶点和边与GaO₅三角双锥和PO₄四面体相连构成，形成化学式为[NiGa₂(PO₄)₃(H₂O)₂]⁻的三维框架。K、Ni和一个P原子位于特殊位置（Wyckoff位置4e，点群对称性2）。框架内有两组通道，一组平行于[10]方向，另一组平行于[001]。这些通道相交，形成三维孔网络，与Ni原子配位的水分子和使框架电荷平衡所需的K⁺离子位于其中。K⁺离子处于高度扭曲的环境中，被十个O原子包围，其中六个O原子距离小于3.1Å。配位水分子与桥连Ga-O-P基团的O原子处于氢键距离内。
