| 四水硝酸钙熔盐的结构研究 |
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| 引用本文： | 房艳,房春晖,林联君,秦绪峰.四水硝酸钙熔盐的结构研究[J].盐湖研究,2007,15(1):39-43. |
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| 作者姓名： | 房艳 房春晖 林联君 秦绪峰 |
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| 作者单位： | 中国科学院青海盐湖研究所,青海,西宁,810008 |
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| 摘 要： | 用θ~θ液体衍射仪精确测量了Ca(NO3)2.4H2O熔体的X射线衍射数据,通过数据处理给出了熔盐的结构函数和实验径向分布函数曲线,并由r=0.618λ/sinθ对结构函数曲线进行了定性描述;通过理论模型计算获得了熔体配位结构参数。研究结果表明,熔体中至少存在一种带单氧桥键或双氧桥键的双核配合物;并用计算给出的局域结构模型,讨论了熔体结构对晶体生长过程的影响。
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| 关 键 词： | 水溶液结构 Ca(NO3)2.4H2O 离子簇 双核配合物 熔盐 X-射线衍射 |
| 文章编号： | 1008-858X(2007)01-0039-05 |
| 修稿时间： | 2005年6月14日 |
A Study on the Structure of Calcium Nitrate Tetrahydrate Molten Salt |
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| FANG Yan,FANG Chun-hui,LIN Lian-jun,QIN Xu-feng.A Study on the Structure of Calcium Nitrate Tetrahydrate Molten Salt[J].Journal of Salt Lake Research,2007,15(1):39-43. |
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| Authors: | FANG Yan FANG Chun-hui LIN Lian-jun QIN Xu-feng |
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| Abstract: | X-ray diffraction of molten salt Ca(NO3)2·4H2O at 20 ℃ has been measured with a θ-θ type X-ray diffractometer.Liquid structural function and radial distribution function of the supercooled liquid have been calculated from the diffraction intensity.Diffraction intensity curve was described by an empirical equation r=0.618)λ/sin θ.The structural parameters of complexes in the molten salt have been obtained from calculation of a theoretical model.The result shows that at least a binuctear complex with a single-oxygen-bridge or a double-oxygen-bridge bond exists in the molten salt.The influence of the structure of the supercooled hydrate on crystallization has been discussed by local structure information. |
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| Keywords: | Aqueous solution structure Calcium nitrate tetrahydrate Ionic cluster Binuclear complex Molten Salt X-ray diffraction |
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