Article Hydrogen diffusion in apatite normal to the c-axis: Estimation of hydrogen diffusing species

Chikashi Yoshimoto ; Shoichi Itoh ; Isao Sakaguchi SAMURAI ORCID (National Institute for Materials Science)

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Chikashi Yoshimoto, Shoichi Itoh, Isao Sakaguchi. Hydrogen diffusion in apatite normal to the c-axis: Estimation of hydrogen diffusing species. Chemical Geology. 2025, 685 (), 122812. https://doi.org/10.1016/j.chemgeo.2025.122812

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(abstract)

水素含有天然アパタイト単結晶をサンプルに水素安定同位体を拡散させ、拡散プロファイルを２次イオン質量分析装置で測定し拡散係数を550-700℃の範囲で決定した。拡散はc軸に垂直な方位で決定した。拡散プロファイルから単純な拡散機構で水素が拡散していることが分かった。さらに、水素拡散の温度依存性を決定した。活性化エネルギーは結晶方位による差はない。活性化エネルギーが酸素拡散とほぼ同じであり、拡散種は酸素に絡むと推定した。

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Keyword: Apatit, Hydrogen diffusion, Hydrogen isotopic composition, H2O, SIMS

Date published: 2025-04-26

Publisher: Elsevier BV

Journal:

  • Chemical Geology (ISSN: 00092541) vol. 685 122812

Funding:

  • JST JPMJSP2110
  • Japan Society for the Promotion of Science 19H00716
  • Japan Society for the Promotion of Science 21H04519
  • Japan Society for the Promotion of Science 16H01118
  • Japan Society for the Promotion of Science 18H01296
  • Japan Society for the Promotion of Science 22K18280
  • Japan Society for the Promotion of Science 20H01994
  • Japan Society for the Promotion of Science 21H04511
  • Japan Society for the Promotion of Science 21H01177
  • Japan Society for the Promotion of Science 18H04367

Manuscript type: Publisher's version (Version of record)

MDR DOI:

First published URL: https://doi.org/10.1016/j.chemgeo.2025.122812

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Updated at: 2025-11-11 16:30:31 +0900

Published on MDR: 2025-11-11 16:24:14 +0900

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