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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
发表期刊CHINESE SCIENCE BULLETIN
卷号54期号:12页码:2022-2027
文章类型Article
摘要A 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.
关键词Solution Structure Sodium Sulfate Radial Distribution Function Contact Ion Pairs X-ray Diffraction
WOS标题词Science & Technology
关键词[WOS]AB-INITIO ; WATER ; ION ; SIMULATION ; HYDRATION ; DYNAMICS ; NA+ ; SCATTERING ; SOLVATION ; SALT
收录类别SCI
语种英语
WOS研究方向Science & Technology - Other Topics
WOS类目Multidisciplinary Sciences
WOS记录号WOS:000267145500007
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被引频次:10[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.isl.ac.cn/handle/363002/5902
专题青海盐湖研究所知识仓储
盐湖资源与化学实验室
作者单位1.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
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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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