XAFS analysis of molten rare-earth-alkali metal fluoride systems

Sou Watanabe, Ashok K. Adya, Yoshihiro Okamoto, N. Umesaki, T. Honma, H. Deguchi, M. Horiuchi, T. Yamamoto, S. Noguchi, K. Takase, A. Kajinami, T. Sakamoto, M. Hatcho, N. Kitamura, Hiroshi Akatsuka, Haruaki Matsuura

    Research output: Contribution to journalArticlepeer-review

    17 Citations (Scopus)

    Abstract

    X-ray absorption fine structure (XAFS) measurements on rare-earth-alkali metal fluoride systems (0.2 LnF3–0.8 MF: Ln = La, Ce, Nd, Sm; M = Li, Na, K) have been carried out at 300 and 1173 K. The local structures around rare-earth-ions in both the solid and liquid phases were evaluated by the curve-fitting analysis, involving anharmonic oscillation effects at the higher temperature. This study revealed that the nearest-neighbour Ln3+–F− distance and the corresponding coordination number of F− around Ln3+ in the molten state mainly depend on the lanthanide species rather than the size of the alkali metal ion.
    Original languageEnglish
    Pages (from-to)71-75
    Number of pages5
    JournalJournal of Alloys and Compounds
    Volume408-412
    DOIs
    Publication statusPublished - 9 Feb 2006

    Keywords

    • Rare-earth fluoride
    • Pyrochemical reprocessing
    • EXAFS
    • Local structure
    • Molten salt

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