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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
AbstractThe 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.
KeywordLi2so4 Solution Structure X-ray Diffraction
WOS HeadingsScience & Technology ; Physical Sciences
Indexed BySCI
WOS Research AreaChemistry
WOS SubjectChemistry, Multidisciplinary
WOS IDWOS:000165592800017
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Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
AffiliationChinese Acad Sci, Inst Salt Lakes, Xian 710043, Peoples R China
Recommended Citation
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.
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