| 采用稀释成盐法从富硼浓缩盐卤中合成的镁硼酸盐化合物及其结构与性质 |
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| 引用本文： | 彭姣玉,林锋,杨波,王立平,Dinnebier E. Robert,董亚萍,李武.采用稀释成盐法从富硼浓缩盐卤中合成的镁硼酸盐化合物及其结构与性质[J].无机化学学报,2016,32(2):305-312. |
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| 作者姓名： | 彭姣玉 林锋 杨波 王立平 Dinnebier E. Robert 董亚萍 李武 |
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| 作者单位： | 中国科学院青海盐湖研究所, 西宁 810008;中国科学院大学, 北京 100049;中国科学院盐湖资源综合高效利用重点实验室, 西宁 810008,中国科学院青海盐湖研究所, 西宁 810008;中国科学院大学, 北京 100049;中国科学院盐湖资源综合高效利用重点实验室, 西宁 810008,中国科学院青海盐湖研究所, 西宁 810008,中国科学院青海盐湖研究所, 西宁 810008;中国科学院大学, 北京 100049;中国科学院盐湖资源综合高效利用重点实验室, 西宁 810008,德国马克斯-普朗克固体研究所, 斯图加特 70569,中国科学院青海盐湖研究所, 西宁 810008;中国科学院大学, 北京 100049,中国科学院青海盐湖研究所, 西宁 810008 |
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| 基金项目： | 国家青年科学基金(No.21501187),青海省科技支撑项目(No.2013-G-138A),青海省(应用)基础研究计划项目(NO. 2013-Z-705),中国科学院 仪器设备功能开发技术创新项目(No.Y410031012)资助。 |
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| 摘 要： | 通过稀释成盐法在富硼浓缩盐卤体系Na-K-Mg-Cl-SO4中合成了一种新的六硼酸镁MgB6O7(OH)6]·5H2O化合物。根据X射线粉末衍射数据对其晶体结构进行了精修,并采用红外及拉曼光谱法对其结构进行了表征,分析了其光谱及结构特征。结果表明,该化合物由1个Mg原子、1个B6O7(OH)6基团和5个H2O分子构成,Mg原子以六配位形式与氧结合形成畸变MgO6八面体构型;热重分析表明,高温分解过程该化合物脱水转化为四硼酸镁MgB4O7;通过紫外可见漫反射法求得其禁带宽度为4.44 eV。
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| 关 键 词： | 镁硼酸盐 含硼盐卤 稀释成盐法 结构 热稳定性 |
| 收稿时间： | 2015/7/13 0:00:00 |
| 修稿时间： | 2015/10/21 0:00:00 |
Synthesis, Structure and Properties of a Magnesium Borate in Concentrated Boron-Bearing Salt Lake Brine by Dilution Method |
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| PENG Jiao-Yu,LIN Feng,YANG Bo,WANG Li-Ping,Dinnebier E. Robert,DONG Ya-Ping and LI Wu.Synthesis, Structure and Properties of a Magnesium Borate in Concentrated Boron-Bearing Salt Lake Brine by Dilution Method[J].Chinese Journal of Inorganic Chemistry,2016,32(2):305-312. |
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| Authors: | PENG Jiao-Yu LIN Feng YANG Bo WANG Li-Ping Dinnebier E Robert DONG Ya-Ping and LI Wu |
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| Institution: | Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, China;University of Chinese Academy of Sciences, Beijing 100049, China;Key Lab of Comprehensive and Highly Efficient Utilization of Salt Lake Resource, Chinese Academy of Science, Xining 810008, China,Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, China;University of Chinese Academy of Sciences, Beijing 100049, China;Key Lab of Comprehensive and Highly Efficient Utilization of Salt Lake Resource, Chinese Academy of Science, Xining 810008, China,Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, China,Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, China;University of Chinese Academy of Sciences, Beijing 100049, China;Key Lab of Comprehensive and Highly Efficient Utilization of Salt Lake Resource, Chinese Academy of Science, Xining 810008, China,Max-Planck Institute for Solid State Research, Stuttgart 70569, Germany,Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, China;University of Chinese Academy of Sciences, Beijing 100049, China and Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, China |
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| Abstract: | A new magnesium borate mineral, MgB6O7(OH)6]·5H2O was synthesized via dilution method from boron-bearing Na-K-Mg-Cl-SO4 salt lakes. The crystal structure of the new phase was solved and refined using X-ray powder diffraction data and characterized with FTIR and Raman. Its asymmetric unit consists of one Mg atom, one B6O7(OH)6 cluster and five H2O molecules. The Mg atom is 6-coordinated with six O atoms to form a MgO6 octahedron. Thermal gravimetry (TG/DSC) was used to investigate the thermal behavior of the new compound. During the high temperature decomposition process the dehydrated product MgB4O7 formed. The optical absorption characteristic of this new mineral was investigated by UV-Vis spectrometer and its energy gap Eg is about 4.44 eV. |
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| Keywords: | magnesium borate boron-bearing salt lake dilution method structure thermal behavior |
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