Assani Abderrazzak, Saadi Mohamed, Zriouil Mohammed, El Ammari Lahcen
Laboratoire de Chimie du Solide Appliquée, Faculté des Sciences, Université Mohammed V-Agdal, Avenue Ibn Battouta, BP 1014, Rabat, Morocco.
Acta Crystallogr Sect E Struct Rep Online. 2012 Aug 1;68(Pt 8):i66. doi: 10.1107/S1600536812033259. Epub 2012 Jul 28.
The title compound, Pb(2)Mn(3)(HPO(4))(2)(PO(4))(2), was synthesized by a hydro-thermal method. All atoms are in general positions except for one Mn atom which is located on an inversion center. The framework of the structure is built up from PO(4) tetra-hedra and two types of MnO(6) octa-hedra, one almost ideal and the other very distorted with one very long Mn-O bond [2.610 (4) Å compared an average of 2.161 Å for the other bonds]. The centrosymetric octa-hedron is linked to two distorted MnO(6) octa-hedra by an edge common, forming infinite zigzag Mn(3)O(14) chains running along the b axis. Adjacent chains are linked by PO(4) and PO(3)(OH) tetra-hedra through vertices or by edge sharing, forming sheets perpendicular to [100]. The Pb(2+) cations are sandwiched between the layers and ensure the cohesion of the crystal structure. O-H⋯O hydrogen bonding between the layers is also observed.
标题化合物Pb(2)Mn(3)(HPO(4))(2)(PO(4))(2)通过水热法合成。除了一个位于对称中心的锰原子外，所有原子均处于一般位置。该结构的骨架由PO(4)四面体和两种类型的MnO(6)八面体构成，一种几乎是理想的，另一种非常扭曲，有一条非常长的Mn - O键[2.610 (4) Å，而其他键的平均长度为2.161 Å]。中心对称的八面体通过一条共用边与两个扭曲的MnO(6)八面体相连，形成沿b轴延伸的无限之字形Mn(3)O(14)链。相邻的链通过PO(4)和PO(3)(OH)四面体通过顶点或共用边相连，形成垂直于[100]的片层。Pb(2+)阳离子夹在层之间，确保晶体结构的凝聚。层间还观察到O - H⋯O氢键。
