An X-ray diffraction study on the structure of Li2SO4 center dot 20H(2)O solution

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	An X-ray diffraction study on the structure of Li2SO4 center dot 20H(2)O solution
	Fang, CH; Ma, PH; Fang, Y; Yang, B; Lei, YC
	2000
发表期刊	ACTA CHIMICA SINICA
卷号	58 期号:11 页码:1393-1397
关键词	Li2so4 Solution Structure X-ray Diffraction
摘要	The structure of Li2SO4 . 2OH(2)O solution has been investigated with a theta - 2 theta type X-ray diffractometer. An empirical formula, r(x-y) = 0. 618 lambda /sin theta, has been applied to carry out qualitatively structural analysis of the diffraction curve, and another r(x-y) = 7.766/s to calculate the interatomic distance of some strong peaks from the reduced intensity curve. The refinement results of structrural models show that the dominant species in the solution are tetraquolithium and octaaquosulfate ion. The Li - H2O distance is fixed at 0.20nm when the coordination number is 4. The water - water distance at four vertexes in the tetrahedron is 0.321nm with n = 6. The distance between lithium ion and water molecules on the second hydration shell was determined to be about 0.425nm, with n = 12. The S - W distance of hydrated sulfate ion with 8 water molecules is estimated to be 0. 386nm. Four interactions of oxygen atom O-s in sulfate ion and the water molecules have been expounded by a symmetric hydration model and the distances of O-s - W(1), O-s - W(2), O-s - W(3) and O-s - W(4) were refined to be 0.288, 0.316, 0.396 and 0.469nm respectively. No reliable enough evidence shows that there are the contact ion - pair and the solvent - shared ion - pair in the solution owing to very low scattering power of lithium.
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/363002/6030
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 Lakes, Xian 710043, Peoples R China
推荐引用方式 GB/T 7714	Fang, CH,Ma, PH,Fang, Y,et al. An X-ray diffraction study on the structure of Li2SO4 center dot 20H(2)O solution[J]. ACTA CHIMICA SINICA,2000,58(11):1393-1397.
APA	Fang, CH,Ma, PH,Fang, Y,Yang, B,&Lei, YC.(2000).An X-ray diffraction study on the structure of Li2SO4 center dot 20H(2)O solution.ACTA CHIMICA SINICA,58(11),1393-1397.
MLA	Fang, CH,et al."An X-ray diffraction study on the structure of Li2SO4 center dot 20H(2)O solution".ACTA CHIMICA SINICA 58.11(2000):1393-1397.