| The finding of natural GaN crystals in sediments from the East Pacific Ocean |
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| 作者姓名： | CHEN Jing SHI Xuefa ZHANG Haiping LUE Huahua FU Zhendong |
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| 作者单位： | [1]Electron Microscopy Laboratory, School of Physics, Peking University, Beijing 100871, China [2]Key Laboratory of Marine Sedimentology and Environmental Geo- logy, First Institute of Oceanography, State Oceanic Administration, Qingdao 260061, China [3]Graduate School of the Chinese Academy of Sciences, Beijing 100049, China |
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| 基金项目： | Acknowledgements The authors would like to express their thanks to Academician Ye Danian for his devoted instruction as well as timely support, and Senior Engineer You Liping for his kind help in the EELS analyses. This work was supported by the National Natural Science Foundation of China （Grant Nos. 40372024 ＆ 49776295）, as well as the China 0cean Mineral Resources R＆D Association （Grant Nos. DY105-01-03-02, DY105-01-04-02）. |
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| 摘 要： | Although as one of the major constituents in pelagic sediments, clay minerals have not been used unambi guously to determine the origin, provenance, and envi ronments of deep sea sediments due to their poor crys tallization state, chemical complexity and …
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| 关 键 词： | 透射电子显微镜 半导体 GaN 表面沉积 太平洋 |
| 文章编号： | 10.1007/s11434-006-1101-9 |
| 收稿时间： | 2005-11-07 |
| 修稿时间： | 2005-11-072006-01-13 |
The finding of natural GaN crystals in sediments from the East Pacific Ocean |
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| CHEN Jing SHI Xuefa ZHANG Haiping LUE Huahua FU Zhendong.The finding of natural GaN crystals in sediments from the East Pacific Ocean[J].Chinese Science Bulletin,2006,51(9):1101-1105. |
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| Authors: | Jing Chen Xuefa Shi Haiping Zhang Huahua Lü Zhendong Fu |
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| Institution: | Electron Microscopy Laboratory, School of Physics, Peking University, Beijing 100871, China;Key Laboratory of Marine Sedimentology and Environmental Geo- logy, First Institute of Oceanography, State Oceanic Administration, Qingdao 260061, China;Key Laboratory of Marine Sedimentology and Environmental Geo- logy, First Institute of Oceanography, State Oceanic Administration, Qingdao 260061, China;Graduate School of the Chinese Academy of Sciences, Beijing 100049, China;Key Laboratory of Marine Sedimentology and Environmental Geo- logy, First Institute of Oceanography, State Oceanic Administration, Qingdao 260061, China;Electron Microscopy Laboratory, School of Physics, Peking University, Beijing 100871, China |
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| Abstract: | The first finding of natural GaN crystals is reported in sediments from the East Pacific. They are identified by multiple micro-beam techniques such as TEM, EDS and EELS. Detailed examinations show that these GaN crystals are euhedral and authigenic, and belong to the hexagonal system (space group P63mc) with cell parameters: a = b = 0.3186 nm, c = 0.5178 nm. Structure data fit closely with those of the synthetic GaN crystals obtained from high-temperature and high-pressure experi- ments. Moreover, the nearly perfect euhedral form of the sample excludes the possible synthetic origin of the GaN crystals as artifacts with long transport. The sampling localities are located between the Clarion and Clipperton Fracture Zone in the East Pacific where ongoing hydrothermal activities, deformation, and volcanic eruptions are very intensive. It is sug- gested that the natural GaN crystals may form at relatively high-temperature and high-pressure condi- tions in geologic environments that have been af- fected by intense hydrothermal activities. |
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| Keywords: | natural GaN crystal TEM surface sediments the East Pacific |
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