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Structure of aqueous sodium sulfate solutions derived from X-ray diffraction
Xu JiXiang1,2; Fang Yan1; Fang ChunHui1
2009-06-01
Source PublicationCHINESE SCIENCE BULLETIN
Volume54Issue:12Pages:2022-2027
SubtypeArticle
AbstractA rapid liquid X-ray diffractometer was used to study the time-averaged and space-averaged structure of aqueous sodium sulfate solutions at 298 and 323 K. Difference radial distribution functions of the solutions were obtained from accurate diffraction data. The interaction distances of Na(+)-OH(2) and S-H(2)O in solutions were found to be 0.235 and 0.385 nm, respectively, after deconvolution of superposition peaks by Gaussian multi-peak fitting program. The characteristic distance of the NaSO (4) (-) contact ion pairs in higher concentration solutions was determined to be 0.345 nm, suggesting that the Na(+) ions coordinated with SO (4) (2-) ions in the mono-dentate form. Effects of concentration and temperature on the hydration structure of the solutions were discussed in the present paper. With a decrease in concentration, the contributions of the H(2)O to the diffraction pattern increase, the average coordination number of the Na(+) ions hardly changes, while the hydration number of SO (4) (2-) ions increases slightly. The formation of NaSO (4) (-) contact ion pairs becomes easier at higher temperature. The structure of hydrogen bond in dilute solutions is broken to a considerable extent with rising temperature, and the peak at 0.290 nm splits into two peaks at 0.275 and 0.305 nm, respectively.
KeywordSolution Structure Sodium Sulfate Radial Distribution Function Contact Ion Pairs X-ray Diffraction
WOS HeadingsScience & Technology
WOS KeywordAB-INITIO ; WATER ; ION ; SIMULATION ; HYDRATION ; DYNAMICS ; NA+ ; SCATTERING ; SOLVATION ; SALT
Indexed BySCI
Language英语
WOS Research AreaScience & Technology - Other Topics
WOS SubjectMultidisciplinary Sciences
WOS IDWOS:000267145500007
Citation statistics
Cited Times:10[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.isl.ac.cn/handle/363002/5902
Collection青海盐湖研究所知识仓储
盐湖资源与化学实验室
Affiliation1.Chinese Acad Sci, Qinghai Inst Salt Lakes, Key Lab Salt Lake Resources & Chem, Xining 810008, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Xu JiXiang,Fang Yan,Fang ChunHui. Structure of aqueous sodium sulfate solutions derived from X-ray diffraction[J]. CHINESE SCIENCE BULLETIN,2009,54(12):2022-2027.
APA Xu JiXiang,Fang Yan,&Fang ChunHui.(2009).Structure of aqueous sodium sulfate solutions derived from X-ray diffraction.CHINESE SCIENCE BULLETIN,54(12),2022-2027.
MLA Xu JiXiang,et al."Structure of aqueous sodium sulfate solutions derived from X-ray diffraction".CHINESE SCIENCE BULLETIN 54.12(2009):2022-2027.
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