Discovery and implication of P2(1)/n crystal structure on a nano-scale in single jadeite crystals
文献类型：期刊论文
| 作者 | X. L. Wu ; Y. J. Han ; D. W. Meng ; D. X. Li |
| 刊名 | Earth and Planetary Science Letters
 |
| 出版日期 | 2002 |
| 卷号 | 197期号:3-4页码:165-169 |
| 关键词 | jadeite omphacite equilibrium transmission electron microscope Dabie Mountains sodic pyroxenes central china dabie-shan petrology shuanghe coesite diamond rocks |
| ISSN号 | 0012-821X |
| 中文摘要 | We present the results of high-resolution transmission electron microscope (HRTEM) studies on jadeite crystals of jadeite quartzite from the Dabie ultra-high-pressure (UHP) metamorphic terrane, China. Although jadeite is known to have only C2/c crystal structure, [100], [110], [112] [010] diffraction patterns and HRTEM images reveal C2/c and P2(1)/n structures in 500 nm microdomains of single jadeite crystals, that we recognized in all the above four orientations. The cell parameters of C2/c crystal structure correspond to those of jadeite, whereas the cell parameters of P2(1)/n structure are equivalent to those of omphacite. The presence of the P2(1)/n structure shows that jadeite partially changed into omphacite on a nano-scale during retrograde metamorphism and that this reaction failed to reach equilibrium. It suggests uplift of the host rock during exhumation accompanied by complex non-equilibrium retrogressive process in the jadeite, with significant implications for the derivation of P-T paths and tectonic interpretation of the Dabie UHP metamorphic terrane. (C) 2002 Elsevier Science B.V. All rights reserved. |
| 原文出处 | |
| 公开日期 | 2012-04-14 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/36462]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | X. L. Wu,Y. J. Han,D. W. Meng,et al. Discovery and implication of P2(1)/n crystal structure on a nano-scale in single jadeite crystals[J]. Earth and Planetary Science Letters,2002,197(3-4):165-169. |
| APA | X. L. Wu,Y. J. Han,D. W. Meng,&D. X. Li.(2002).Discovery and implication of P2(1)/n crystal structure on a nano-scale in single jadeite crystals.Earth and Planetary Science Letters,197(3-4),165-169. |
| MLA | X. L. Wu,et al."Discovery and implication of P2(1)/n crystal structure on a nano-scale in single jadeite crystals".Earth and Planetary Science Letters 197.3-4(2002):165-169. |
入库方式： OAI收割
来源：金属研究所
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