| 锡石的原位高压X射线衍射研究 |
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| 引用本文： | 隋兴伟,秦善,李海建,李玉娟,刘景,李晓东,李晖.锡石的原位高压X射线衍射研究[J].矿物岩石,2006,26(2):10-15. |
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| 作者姓名： | 隋兴伟 秦善 李海建 李玉娟 刘景 李晓东 李晖 |
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| 作者单位： | 1. 北京大学地球与空间科学学院,造山带与地壳演化教育部重点实验室,北京,100871
2. 中国科学院高能物理研究所同步辐射实验室,北京,100039 |
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| 基金项目： | 国家自然科学基金项目（40272023）;国家自然科学基金重大项目（10299040） |
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| 摘 要： | 利用同步辐射能量色散X射线衍射(EDXD)方法和金刚石对顶砧(DAC)高压技术对采于四川平武的锡石进行原位高压(达24.0 GPa)结构研究发现:压力加载过程中,锡石在13.8 GPa时发生了从金红石型结构(P 42/m nm)到C aC l2型结构(P nnm)的位移式相变;在19.9 GPa时又由C aC l2型结构相变为黄铁矿型结构(P a3),此相变为重构式相变。对于第Ⅳ主族元素氧化物(S iO2,G eO2,SnO2和PbO2)及过渡金属氧化物(M nO2和R uO2)的高压行为进行了讨论,它们具有相似的高压相变序列,这些成果对与斯石英同构氧化物的高压行为研究提供了有价值的参考。
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| 关 键 词： | 锡石 高压 结构 相变 同步辐射 X射线衍射 |
| 文章编号： | 1001-6872（2006）02-0010-06 |
| 收稿时间： | 2006-02-27 |
| 修稿时间： | 2006-04-08 |
IN-SITU HIGH-PRESSURE X-RAY DIFFRACTION RESEARCH OF NATURAL CASSITERITE |
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| SUI Xing-wei,QIN Shan,LI Hai-jian,LI Yu-juan,LIU Jing,LI Xiao-dong,LI Hui.IN-SITU HIGH-PRESSURE X-RAY DIFFRACTION RESEARCH OF NATURAL CASSITERITE[J].Journal of Mineralogy and Petrology,2006,26(2):10-15. |
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| Authors: | SUI Xing-wei QIN Shan LI Hai-jian LI Yu-juan LIU Jing LI Xiao-dong LI Hui |
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| Institution: | 1.School of Earth and Space Sciences,the Key Laboratory of Orogenic Belts and Crustal Evolution,MOE,Peking University,Beijing 100871,China; 2. Laboratory of Synchrotron Radiation,Institute of High Energy Physics, Chinese Academy of Sciences,Beijing 100039,China |
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| Abstract: | The in-situ high-pressure structure of natural cassiterite,obtained from Pingwu in Sichuan province,has been studied by using synchrotron radiation energy dispersive X-ray diffraction and diamond anvil cell at the pressure up to 24.0 GPa.Two pressure-induced phase transitions,from rutile-type(P4_2/mnm) to CaCl_2-type(Pnnm) to pyrite-type(Pa3) at the pressures of 13.8 GPa and 19.9 GPa,were experimentally observed.The dioxides of the group IVb metals(SiO_2,GeO_2,SnO_2,PbO_2),MnO_2,and RuO_2 have a similar sequence of phase transitions under high-pressure.In addition,this research would be potentially helpful for the understanding of high-pressure behavior of other stishovite-type oxides. |
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| Keywords: | cassiterite high-pressure structure phase trancition synchrotron radiation X-ray diffraction |
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