文献类型：期刊文献

英文题名：Diammonium tricadmium tris(sulfate) dihydroxide dihydrate

作者：Yin, Xin

机构：[1]E China Univ Sci & Technol, Dept Chem, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China

年份：2011

卷号：67

起止页码：I31

外文期刊名：ACTA CRYSTALLOGRAPHICA SECTION E-STRUCTURE REPORTS ONLINE

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000291308300003)】；

语种：英文

摘要：The title compound, (NH4)(2)Cd-3(SO4)(3)(OH)(2)(H2O)(2), has been obtained serendipitously. It is isotypic with the heavier alkali analogues M2Cd3(SO4)(3)(OH)(2)(H2O)(2) (M = K, Rb, Cs). The structure contains two Cd2+ ions, one in a general position and one with site symmetry m. The former Cd2+ ion is coordinated by three O atoms of three SO4 groups, two hydroxide O atoms and one water O atom, the latter Cd2+ ion by four O atoms of four SO4 groups and two hydroxide O atoms, both in a distorted octahedral coordination geometry. This arrangement leads to the formation of a layered framework extending parallel to (100), with the ammonium cations situated in the voids. O-H center dot center dot center dot O hydrogen bonds involving the water molecules, hydroxide groups and sulfate O atoms, as well as N-H center dot center dot center dot O hydrogen bonds between ammonium cations and sulfate O atoms consolidate the crystal packing.