Ould Saleck Ahmed, Assani Abderrazzak, Saadi Mohamed, 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. 2013 Oct 26;69(Pt 11):i79. doi: 10.1107/S1600536813028869.
The title compound, Cd2V2O7, was obtained under hydro-thermal conditions. Different from the known monoclinic form, the new polymorph of Cd2V2O7 has triclinic symmetry and is isotypic with Ca2V2O7. The building units of the crystal structure are two Cd(2+) cations, with coordination numbers of six and seven, and two V atoms with a tetra-hedral and a significantly distorted trigonal-pyramidal coordination environment, respectively. Two VO5 pyramids share an edge and each pyramid is connected to one VO4 tetra-hedron via a corner atom, forming an isolated V4O14 (8-) anion. These anions are arranged in sheets parallel to (-211) and are linked through the Cd(2+) cations into a three-dimensional framework structure.
标题化合物Cd2V2O7是在水热条件下获得的。与已知的单斜晶型不同，Cd2V2O7的新多晶型具有三斜对称性，并且与Ca2V2O7同型。晶体结构的构建单元是两个Cd(2+)阳离子，配位数分别为六和七，以及两个V原子，分别具有四面体和明显扭曲的三角锥配位环境。两个VO5金字塔共享一条边，并且每个金字塔通过一个角原子连接到一个VO4四面体，形成一个孤立的V4O14(8-)阴离子。这些阴离子排列在平行于(-211)的平面中，并通过Cd(2+)阳离子连接成三维骨架结构。
