Zheng Juan, Zhang Aiyun
Department of Physics and Chemistry, Henan Polytechnic University, Jiaozuo 454000, People's Republic of China.
Acta Crystallogr Sect E Struct Rep Online. 2009 May 7;65(Pt 6):i42. doi: 10.1107/S1600536809014652.
The title borophosphate LiNi(H(2)O)(2)[BP(2)O(8)]·H(2)O was synthesized under hydro-thermal conditions. The crystal structure is isotypic with the Mg analogue and features helical BP(2)O(8) borophosphate ribbons, constructed by BO(4) (2 symmetry) and PO(4) tetra-hedra. The borate groups share all their oxygen apices with adjacent phosphate tetra-hedra. The ribbons are connected via Ni(2+) cations that are located on twofold rotation axes. The cations have a slightly distorted octa-hedral oxygen coordination by four O atoms from the anion and by two water mol-ecules. The voids within the helices are occupied by Li(+) cations, likewise located on twofold rotation axes, in an irregular environment of five O atoms. The structure is stabilized by O-H⋯O hydrogen bonds between coordinated or uncoordinated water mol-ecules and O atoms that are part of the helices.
标题为硼磷酸盐LiNi(H₂O)₂[BP₂O₈]·H₂O的化合物是在水热条件下合成的。其晶体结构与镁的类似物同型，具有螺旋状的[BP₂O₈]³⁻硼磷酸盐带，由BO₄（2对称）和PO₄四面体构成。硼酸根基团与相邻的磷酸四面体共享其所有氧顶点。这些带通过位于二次旋转轴上的Ni²⁺阳离子相连。阳离子具有略微扭曲的八面体氧配位，由来自阴离子的四个O原子和两个水分子配位。螺旋内部的空隙被Li⁺阳离子占据，Li⁺阳离子同样位于二次旋转轴上，处于五个O原子的不规则环境中。该结构通过配位或未配位的水分子与作为螺旋一部分的O原子之间的O—H⋯O氢键得以稳定。
