2023 Fiscal Year Final Research Report
Study on the polyamorphous materials distributed in the Earth's surface using amorphous structural analysis
| Project/Area Number |
20K04124
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 17040:Solid earth sciences-related
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| Research Institution | University of Tsukuba |
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Principal Investigator |
Kyono Atsushi 筑波大学, 生命環境系, 准教授 (40375431)
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| Project Period (FY) |
2020-04-01 – 2024-03-31
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| Keywords | 二酸化炭素回収貯留 / 炭酸マグネシウム / Hydromagnesite / Dypingite / Nesquehonite / 非晶質炭酸マグネシウム（AMC） / ポリアモルフィズム |
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| Outline of Final Research Achievements |
Carbon dioxide Capture and Storage (CCS) technology has attracted considerable attention as a promising method for long-term, stable carbon dioxide sequestration. Magnesium carbonate hydrates are one of the major mineral species occurring the CCS process. The aim of this study was to clarify the structure of amorphous magnesium carbonate derived from the magnesium carbonate hydrates. This study revealed that there are at least three different structures of amorphous magnesium carbonate. This indicates that there are actually polyamorphous materials with different structures distributed on the Earth’s surface, and it is necessary to clarify the properties of each polyamorphous materials in the future.
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| Free Research Field |
鉱物学，地球惑星科学
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| Academic Significance and Societal Importance of the Research Achievements |
アモルファス物質は，土壌中だけでなく河川や海洋にも普遍的に含まれている．アモルファス物質は，熱変成や水質変成などの変成作用や，水中に溶け出した物質のゾルゲル反応など，様々な要因によって容易に生成される．アモルファス物質は，重元素を濃集したり，水や有機物を取り込み運搬したり，地球上で非常に重要な役割を担っている．しかし，これまではアモルファス物質がどのような構造を持つのか，まったく理解できていなかった．本研究によって非晶質炭酸マグネシウムの構造が明らかになり，少なくとも3種類の異なる構造を持つという事実が明らかになったことは大きな成果であり，今後の展開につながる重要な成果である．
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