Determination of Host Phase of Lanthanum in Deep-sea REY-rich Mud by XAFS and µ-XRF Using High-energy Synchrotron Radiation

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    • Kashiwabara Teruhiko
    • Institute for Research and Earth Evolution (IFREE)/Submarine Resource Research Project (SRRP), Japan Agency for Marine-Earth Science and Technology (JAMSTEC)
    • Toda Ryuichi
    • Department of Systems Innovation, The University of Tokyo
    • Honma Tetsuo
    • SPring-8, Japan Synchrotron Radiation Research Institute (JASRI)
    • Takahashi Yoshio
    • Department of Earth and Planetary Systems Science, Graduate School of Science, Hiroshima University


Host phase of lanthanum (La) in deep-sea rare-earth elements and yttrium (REY)-rich mud was directly determined by X-ray absorption fine structure (XAFS) and micro-focused X-ray fluorescence (µ-XRF) analyses. Excitation of K edge of La by high-energy X-ray allowed us to avoid severe interferences of coexisting elements such as vanadium and titanium in XAFS and XRF. It was revealed for the first time that La is accumulated in apatite in this type of sediments.


  • Chemistry Letters

    Chemistry Letters 43(2), 199-200, 2014

    The Chemical Society of Japan


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