Application of MV-edge XANES to determination of U oxidation state in zircon
作者: Kazuya TanakaYoshio Takahashi
作者单位: 1Advanced Science Research Center, Japan Atomic Energy Agency
2Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo
刊名: GEOCHEMICAL JOURNAL, 2019, Vol.53 (5), pp.329-331
来源数据库: J-STAGE Journals
DOI: 10.2343/geochemj.2.0568
关键词: Oxidation stateUMV-edge XANESZircon
原始语种摘要: We examined three natural zircon samples with different amounts of radiation doses (1.9 × 1015–6.8 × 1015 α-decay events/mg) using MV-edge and LIII-edge U X-ray absorption near-edge structure (XANES). Analysis of XANES spectra at both MV-edge and LIII-edge suggested that the oxidation state of U in the zircon sample with the highest radiation dose is tetravalent. The XANES spectra of the two other samples with lower radiation doses suggested a mixture of U(IV) and U(VI), while the possibility of U(V) was not excluded. This is the first work on the application of MV-edge U XANES to the oxidation state of U in natural zircon.
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  • oxidation 氧化
  • zircon 锆石
  • state 状态
  • suggested 建议
  • XANES X射线吸收近边结构
  • radiation 辐射
  • natural 自然的
  • determination 测定
  • tetravalent 四价的
  • first 第一