蒙皂石-乙二醇有机复合体结构模型修正

REFINEMENT OF THE STRUCTURE MODEL OF SMECTITEETHYLENE GLYCOL ORGANIC COMPLEX

通过对一例蒙皂石－乙二醇有机复合体的结构研究，修正了传统的结构模型，并从化学键、有机分子构型及层间域的有效空间等方面综合考虑，证明了所提出的新结构模型的合理性。在新的结构模型中，乙二醇分子为梯形排列，单位晶胞所容纳的乙二醇分子为４个，每个乙二醇分子可与硅酸盐层基底氧形成两个氢键，并且乙二醇分子的构型显示了极性分子的性质，层间域Ｃａ离子和剩余水分子正对于六方网环的中心，与另一侧的乙二醇分子相对应，新结构模型的可信度因子Ｒ＝０．０８１。

The traditional structure model is refined by means of research on the structure model of smectiteethylene glycol organic complex,and the new model is confirmed rational from the chemical bonds,the shape of the organic molecules,and the area in the interlayer space.In the new model,the ethylene glycol molecules are laddershaped,and there are four organic molecules in the unit cell.Every organic molecule,which has polar characteristic,forms two hydrogen bonds with the basal oxygen of the silicate layers.The positions of the cations Ca and water molecules in the interlayer space are projected to the centers of the 6fold basal oxygens of the silicate layers,corresponding to the ethylene glycol molecules on the other side.The reliant factor R of the new model equals to 0081.