Download file (1.48MB)
Download as zip (1.18MB)

コレクション

引用

説明:

Carbon dioxide (CO₂) is a prevalent volatile in the Earth’s interior, but its effect on the structural properties of silicate melts remains insufficiently understood. In this study, we explored the structure of carbon bearing Na2O–SiO2 melts up to ~5 GPa using in-situ synchrotron X-ray diffraction (XRD) and classical molecular dynamics (MD) simulation. Both XRD and MD results showed that the intermediate-range structure of Na2Si3O7 melts was not modified by the addition of CO2. In contrast, MD simulation found that carbonate ions depolymerized the Si–O network structure in SiO2 melts by the formation of Si–CO32−–Si. It is suggested that the presence of network carbonate ions may contribute to the decrease of viscosity in the fully polymerized melts (NBO/T = 0).

権利情報:

• In Copyright
  

キーワード: シリカ, 液体, 高圧, MDシミュレーション

刊行年月日: 2025-03-17

出版者: Japan Association of Mineralogical Sciences

掲載誌:

• Journal of Mineralogical and Petrological Sciences (ISSN: 13456296) vol. 120 issue. 1 241126L

研究助成金:

原稿種別: 著者最終稿 (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.5456

公開URL: https://doi.org/10.2465/jmps.241126l

関連資料:

その他の識別子:

連絡先:

更新時刻: 2025-04-30 11:23:41 +0900

MDRでの公開時刻: 2025-04-30 12:23:12 +0900