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. 2010 Dec 24;67(Pt 1):i5. doi: 10.1107/S1600536810053304.
The title compound, AgMg(3)(PO(4))(HPO(4))(2), which has been synthesized by the hydro-thermal method, has an alluaudite-like structure which is formed by edge-sharing MgO(6) octa-hedra (one of which has symmetry 2), resulting in chains linked together by phosphate groups and hydrogen bonds. The three-dimensional framework leads to two different channels along the c axis, one of which is occupied by Ag(+) ions with a square-planar coordination. The Ag(+) ions are disordered over two sites in a 0.89 (3):0.11 (3) ratio. The OH groups, which point into the other type of channel, are involved in strong O-H⋯O hydrogen bonds. The title compound is isotypic with the compounds AM(3)H(2)(XO(4))(HXO(4))(2) (A = Na or Ag, M = Mn, Co or Ni, and X = P or As) of the alluaudite structure type.
标题化合物AgMg₃(PO₄)(HPO₄)₂是通过水热法合成的，具有类磷铝石结构，该结构由共用棱边的MgO₆八面体（其中一个具有2次对称性）形成，从而形成由磷酸基团和氢键连接在一起的链。三维骨架沿着c轴形成两个不同的通道，其中一个通道被具有平面正方形配位的Ag⁺离子占据。Ag⁺离子在两个位置上无序分布，比例为0.89 (3):0.11 (3)。指向另一种通道类型的OH基团参与了强O-H⋯O氢键。标题化合物与磷铝石结构类型的化合物AM₃H₂(XO₄)(HXO₄)₂（A = Na或Ag，M = Mn、Co或Ni，X = P或As）同型。
