冲击诱发方解石结构演化的原位观察

IF 1.2 4区地球科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Physics and Chemistry of Minerals Pub Date : 2025-05-04 DOI:10.1007/s00269-025-01320-0

Yuhei Umeda, Norimasa Ozaki, Toshimori Sekine, Yoichiro Hironaka, Yuichi Inubushi, Kento Katagiri, Ryosuke Kodama, Kohei Miyanishi, Hirotaka Nakamura, Tomoko Sato, Yusuke Seto, Keiichi Sueda, Tadashi Togashi, Naotaka Tomioka, Toshinori Yabuuchi, Makina Yabashi, Takuo Okuchi

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引用次数: 0

摘要

在这项研究中，我们旨在评估方解石（CaCO3）的冲击诱导行为，CaCO3是CO和/或CO2的潜在来源。为此，我们利用超快时间分辨x射线衍射（XRD）和激光驱动激波压缩系统，实验研究了方解石在高达234±19 GPa的激波压缩和减压过程中的时间演变。对激波方解石的XRD分析表明，在压力大于86±7 GPa的激波压缩阶段，方解石发生了非晶化，在纳秒时间尺度的减压阶段没有观察到分解反应，即CaCO3 = CaO + CO2。这一观察结果表明，除了压力和温度外，冲击持续时间（反应时间）也是影响冲击引起的非晶化和分解等结构变化的关键因素。此外，本研究中采用的纳秒激光冲击可以用于加强对微米到亚毫米大小弹体撞击现象的理解。目前的研究结果表明，在微陨石撞击过程中，方解石不会发生激波分解。

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In situ observation of shock-induced structural evolution of calcite

In this study, we aimed to evaluate the shock-induced behavior of calcite (CaCO₃), a potential source of CO and/or CO₂. To this end, we experimentally investigated the time evolution of calcite during shock compression and decompression processes at shock pressures up to 234 ± 19 GPa using an ultrafast time-resolved X-ray diffraction (XRD) coupled with a laser-driven shock compression system. The XRD analysis of shocked calcite showed that the amorphization occurred in the shock compression stage at pressures above 86 ± 7 GPa, and that the decomposition reaction, i.e., CaCO₃ = CaO + CO₂, was not observed in the decompression stage within the nanosecond timescale. This observation indicated that in addition to pressure and temperature, the shock duration (reaction time) is also a critical factor affecting shock-induced structural changes, such as amorphization and decomposition. Furthermore, the nanosecond laser shock employed in this study may be applied to enhance understanding regarding the impact phenomena of micrometer to submillimeter sized projectiles. The present results suggest that the shock-induced decomposition of calcite does not occur during micrometeorite impacts.

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来源期刊

Physics and Chemistry of Minerals 地学-材料科学：综合

CiteScore

2.90

自引率

14.30%

发文量

审稿时长

3 months

期刊介绍： Physics and Chemistry of Minerals is an international journal devoted to publishing articles and short communications of physical or chemical studies on minerals or solids related to minerals. The aim of the journal is to support competent interdisciplinary work in mineralogy and physics or chemistry. Particular emphasis is placed on applications of modern techniques or new theories and models to interpret atomic structures and physical or chemical properties of minerals. Some subjects of interest are: -Relationships between atomic structure and crystalline state (structures of various states, crystal energies, crystal growth, thermodynamic studies, phase transformations, solid solution, exsolution phenomena, etc.) -General solid state spectroscopy (ultraviolet, visible, infrared, Raman, ESCA, luminescence, X-ray, electron paramagnetic resonance, nuclear magnetic resonance, gamma ray resonance, etc.) -Experimental and theoretical analysis of chemical bonding in minerals (application of crystal field, molecular orbital, band theories, etc.) -Physical properties (magnetic, mechanical, electric, optical, thermodynamic, etc.) -Relations between thermal expansion, compressibility, elastic constants, and fundamental properties of atomic structure, particularly as applied to geophysical problems -Electron microscopy in support of physical and chemical studies -Computational methods in the study of the structure and properties of minerals -Mineral surfaces (experimental methods, structure and properties)