College of Chemistry and Chemical Engineering, Inner Mongolia University, 235 West University Road, Hohhot 010021, China.
Inorg Chem. 2011 Oct 3;50(19):9238-42. doi: 10.1021/ic2002749. Epub 2011 Sep 9.
A vertex-shared tetrahedral Al(4)(OH)(6)(H(2)O)(12) (Al(4)) and a disordered Al(H(2)O)(6) (Al(1)) that coexist in a 1:2 ratio within each unit cell were observed in the structure of [Al(4)(OH)(6)(H(2)O)(12)]Al(H(2)O)(6)Br(12), which crystallized in a cubic Fd3m space group from a spontaneously hydrolyzed solution of AlBr(3). The former is composed of four AlO(6) octahedra that are connected to each other by sharing three vertexes of each octahedron and form a large regular tetrahedron with ideal T(d) symmetry. The central Al(3+) ion of the latter is coordinated by 6 disordered OH(2) molecules, that form a core-shell structure with ideal D(3d) symmetry.
在 [Al(4)(OH)(6)(H(2)O)(12)]Al(H(2)O)(6)Br(12) 的结构中，观察到一个顶点共享的四面体 Al(4)(OH)(6)(H(2)O)(12)（Al(4)）和一个无序的 Al(H(2)O)(6)（Al(1)），它们在每个晶胞中以 1:2 的比例共存。该物质从自发水解的 AlBr(3)溶液中结晶，具有立方 Fd3m 空间群。前者由四个 AlO(6)八面体组成，这些八面体通过共享每个八面体的三个顶点相互连接，形成一个具有理想 T(d)对称性的大型正四面体。后者的中心 Al(3+)离子由 6 个无序的 OH(2)分子配位，这些分子形成具有理想 D(3d)对称性的核壳结构。
