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| Electron microscopy study of the sakhaite from endogenous borate deposit in Hunan, China | |
| 作者姓名： | LIU Xiangwen YANG Guangming ZOU Huamin QU Jing & ZHAO Wenxia . Graduate School China University of Geosciences Wuhan China . Test Center China University of Geosciences Wuhan China . Physics and Technology College Wuhan University Wuhan China . Test Center Zhongshan University Guangzhou China |
| 作者单位： | LIU Xiangwen1，2，YANG Guangming2，ZOU Huamin3，QU Jing1 & ZHAO Wenxia4 1. Graduate School，China University of Geosciences，Wuhan 430074，China; 2. Test Center，China University of Geosciences，Wuhan 430074，China; 3. Physics and Technology College，Wuhan University，Wuhan 430072，China; 4. Test Center，Zhongshan University，Guangzhou 510275，China |
| 摘 要： | Sakhaite was first discovered by Ostrovskaya, Pertsev and Nikitina at Siberia in the former Soviet Union. By using the X-ray diffraction technique, they proved that the crystal system of sakhaite was cubic (a = 1.464 nm), its possible space groups were Fm3m, F432, F43m, Fm3, F23, and its crystal chemical for-mula was Ca48Mg16(CO3)16(BO3)28Cl4(OH)8 4H2O1]. Chichagov, Simonov and Belov studied the crystal structure of synthetic sakhaite and determined that its space group was F4132, … |
Electron microscopy study of the sakhaite from endogenous borate deposit in Hunan, China |
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| LIU Xiangwen,,YANG Guangming,ZOU Huamin,QU Jing & ZHAO Wenxia . Graduate School,China University of Geosciences,Wuhan ,China, . Test Center,China University of Geosciences,Wuhan ,China, . Physics and Technology College,Wuhan University,Wuhan ,China, . Test Center,Zhongshan University,Guangzhou ,China.Electron microscopy study of the sakhaite from endogenous borate deposit in Hunan, China[J].Science in China(Earth Sciences),2004,47(3). | |
| Authors: | Liu Xiangwen YANG Guangming ZOU Huamin QU Jing Zhao Wenxia |
| Institution: | 1. Graduate School, China University of Geosciences, Wuhan,430074, China;Test Center, China University of Geosciences, Wuhan,430074, China 2. Test Center, China University of Geosciences, Wuhan,430074, China 3. Physics and Technology College, Wuhan University, Wuhan,430072, China 4. Graduate School, China University of Geosciences, Wuhan,430074, China 5. Test Center, Zhongshan University, Guangzhou,510275, China |
| Abstract: | Sakhaite specimens from an endogenous borate deposit in Hunan Province, China have been studied in detail by means of transmission electron microscopy (TEM). The selected area electron diffraction (SAED) patterns obtained with different crystal zone axes show that the crystal system is cubic, with a = 1.463 nm. The convergent beam electron diffraction (CBED) patterns indicate that the point group and space group of sakhaite is m3m and Fd3m, respec-tively. The space group of synthetic sakhaite determined by Chichagov (1974) is F4132. The possible reasons why the space groups of the natural and the synthetic sakhaites are different are discussed. |
| Keywords: | sakhaite space group convergent beam electron diffraction (CBED) |
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