Structural Modifications of Single-Crystal Aragonite CaCO3 Beginning at similar to 15 GPa: In Situ Vibrational Spectroscopy and X-Ray Diffraction Evidence
文献类型：期刊论文
| 作者 | Gao, Jing2,3; Liu, Yungui4; Wu, Xiang4; Yuan, Xueyin1; Liu, Yingxin5; Su, Wen2,3 |
| 刊名 | MINERALS
 |
| 出版日期 | 2020-10-01 |
| 卷号 | 10期号:10页码:18 |
| 关键词 | calcium carbonate crystal chemistry OH bands diamond anvil cell |
| DOI | 10.3390/min10100924 |
| 英文摘要 | The structural chemistry of carbonates under mantle conditions facilitates our understanding of carbon recycling pathways in the earth's interior. It also has impacts on the dynamics of mantle-slab interactions. Aragonite is a common calcium carbonate mineral in pelagic marine sediments. The structural chemistry of single-crystal aragonite during successive compression and the behavior of a structural H+ have been investigated by micro-vibrational spectroscopy and synchrotron X-ray diffraction techniques in diamond anvil cells. We describe a reduction of the b-axial compressibility beginning at similar to 15 GPa, and the related discontinuities in the first-order derivatives of the vibrational modes. The structural modifications of aragonite are manifested by mutations occurring in the pressure relations of the wavenumbers of the O-C-O bending modes, and of the bandwidth and band intensities of the measured internal and external modes. These anomalies are indicative of changes occurring in the force constant of the C-O bonds, and possibly a second-order phase transition. Besides, the [CaO9] polyhedra begin to deform, possibly with some Ca-O bonds becoming elongated and the others shortening. An increase in the co-ordination number for the Ca2+ sites could be expected under higher pressures. Additionally, the weakening of the OH modes may imply H+-loss from the aragonite lattice above 11.5 GPa. |
| WOS关键词 | EQUATION-OF-STATE ; HIGH-PRESSURE ; THERMAL-EXPANSION ; SUBDUCTION ZONES ; OCEANIC-CRUST ; MANTLE ; CARBON ; PHASE ; DOLOMITE ; POLYMORPHS |
| 资助项目 | National Key Research and Development Program of China[2018YFA 0702601] ; Natural Science Foundation of China[41902035] ; Natural Science Foundation of China[41490614] ; Natural Science Foundation of China[41822202] ; China Postdoctoral Science Foundation[2018M640179] ; China Postdoctoral Science Foundation[2019T120132] ; National Science Foundation of China[41827802] |
| WOS研究方向 | Mineralogy ; Mining & Mineral Processing |
| 语种 | 英语 |
| WOS记录号 | WOS:000582913100001 |
| 出版者 | MDPI |
| 资助机构 | National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/98216]  |
| 专题 | 地质与地球物理研究所_岩石圈演化国家重点实验室 |
| 通讯作者 | Gao, Jing |
| 作者单位 | 1.Chinese Acad Geol Sci, Inst Mineral Resources, MNR Key Lab Metallogeny & Mineral Assessment, Beijing 100037, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, Inst Earth Sci, Beijing 100029, Peoples R China 4.China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Wuhan 430074, Peoples R China 5.China Univ Geosci, Sch Gemmol, Beijing 100083, Peoples R China |
| 推荐引用方式 GB/T 7714 | Gao, Jing,Liu, Yungui,Wu, Xiang,et al. Structural Modifications of Single-Crystal Aragonite CaCO3 Beginning at similar to 15 GPa: In Situ Vibrational Spectroscopy and X-Ray Diffraction Evidence[J]. MINERALS,2020,10(10):18. |
| APA | Gao, Jing,Liu, Yungui,Wu, Xiang,Yuan, Xueyin,Liu, Yingxin,&Su, Wen.(2020).Structural Modifications of Single-Crystal Aragonite CaCO3 Beginning at similar to 15 GPa: In Situ Vibrational Spectroscopy and X-Ray Diffraction Evidence.MINERALS,10(10),18. |
| MLA | Gao, Jing,et al."Structural Modifications of Single-Crystal Aragonite CaCO3 Beginning at similar to 15 GPa: In Situ Vibrational Spectroscopy and X-Ray Diffraction Evidence".MINERALS 10.10(2020):18. |
入库方式： OAI收割
来源：地质与地球物理研究所
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