An X-ray diffraction study on the structure of the supersaturated MgSO4 solutions

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	An X-ray diffraction study on the structure of the supersaturated MgSO4 solutions
	Fang, CH; Fang, Y; Guo, YM; Yang, B; Lei, YC
	2004-02-14
发表期刊	ACTA CHIMICA SINICA
卷号	62 期号:3 页码:268-273
关键词	Liquid Structure Supersaturated Solution Mgso4 X-ray Diffraction
摘要	The hydration structure of the supersaturated MgSO4 solutions has been investigated by means of X-ray diffraction at 298 K. An empirical golden rule, r = 0.618lambda/sin theta, has been used to extract some structural information from the experimental diffraction curve, and the other, r = 0.618 x 4pi/s, to expound some peaks on the structural function curve. The calculation of the structural model shows there exist the water-shared ion-pair and the contact ion-pair in the supersaturated solutions. The characteristic Mg-S distance of the contact ion-pair has been determined to be about 0.328 nm. It shows that the contact ion-pair MgSO40 is a unidentate complex. The Mg-O-S(1) distance between magnesium ion and the nearest oxygen atom in sulfate ion has been measured to be 0.205 nm and is equivalent to that of Mg-H2O. The Mg-Os (2) distance is close to that of Mg-Os (3), about 0.355 nm. The Mg-O-S(4) distance is situated at about 0.456 nm. The number of ion-pairs obviously increases with the increasing of concentration. The marked Mg-S distance of the water-shared ion-pair coexisting with the contact ion-pair was refined to be 0.492 nm. The symmetry of the hydration structure of sulfate ion is lowered by complex formation of magnesium ion with sulfate anion.
语种	英语
引用统计
文献类型	期刊论文
条目标识符	http://ir.isl.ac.cn/handle/363002/6120
专题	青海盐湖研究所知识仓储中国科学院青海盐湖研究所
作者单位	Chinese Acad Sci, Inst Salt Lake, Xining 810008, Peoples R China
推荐引用方式 GB/T 7714	Fang, CH,Fang, Y,Guo, YM,et al. An X-ray diffraction study on the structure of the supersaturated MgSO4 solutions[J]. ACTA CHIMICA SINICA,2004,62(3):268-273.
APA	Fang, CH,Fang, Y,Guo, YM,Yang, B,&Lei, YC.(2004).An X-ray diffraction study on the structure of the supersaturated MgSO4 solutions.ACTA CHIMICA SINICA,62(3),268-273.
MLA	Fang, CH,et al."An X-ray diffraction study on the structure of the supersaturated MgSO4 solutions".ACTA CHIMICA SINICA 62.3(2004):268-273.