Fe2+/Fe3+ ratios in olivine estimated using an Electron Microprobe Analyzer verified by <index>57</index>Fe Moessbauer spectroscopy

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  • EJIMA Terumi
    Department of Materials Creation and Circulation Technology, Graduate School of Science and Engineering, Shimane University
  • AKASAKA Masahide
    Department of Materials Creation and Circulation Technology, Graduate School of Science and Engineering, Shimane University

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Other Title
  • 電子マイクロプローブ分析によるかんらん石中のＦｅ｀２＋´／Ｆｅ｀３＋´　比の見積もり：メスバウアー分光法による検証
  • 電子マイクロプローブ分析によるかんらん石中のFe[2+]/Fe[3+]比の見積もり--メスバウアー分光法による検証
  • デンシ マイクロプローブ ブンセキ ニ ヨル カンランセキ チュウ ノ Fe 2 Fe 3 ヒ ノ ミツモリ メスバウアー ブンコウホウ ニ ヨル ケンショウ
  • Fe2+/Fe3+ ratios in olivine estimated using an Electron Microprobe Analyzer verified by 57Fe Mössbauer spectroscopy

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Abstract

  Fe2+:Fe3+ ratios of natural fayalite and forsterite were estimated by applying a correlation between Fe2+:Fe3+ ratios and relative intensities of FeLα and FeLβ X-ray emission peaks. These ratios were then compared to those determined by the Mössbauer spectroscopic method to examine the consistency between the two methods. Average Fe2+:Fe3+ ratios of the fayalite and forsterite obtained from the X-ray emission peak intensities were 94(3):6(3) (n = 3) and 90(3):10(3) (n = 3), respectively. These values were close to those determined by Mössbauer analysis: 94(3):6(1) and 94(4):6(1) for fayalite and forsterite, respectively. The X-ray emission peak intensity method is thus useful for the estimation of Fe3+ content in olivine.<br>

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