• Part of
    Ubiquity Network logo
    Interesse beim KIT-Verlag zu publizieren? Informationen für Autorinnen und Autoren

    Online lesen
  • No readable formats available
  • Raman spectroscopic study of high temperature rare earth metal - rare earth halide solutions: Ln-LnX3- and LnX2-LnX3-(LiX-KX)eu systems (Ln: Nd, Ce; X: Cl, I) [online]

    V.M. Rodriguez Betancourtt

     Download

    In this work new Raman spectroscopic experiments on rare earth metal-rare earth trihalide melts (Ln-LnX3 and LnX2-LnX3: Ln=Ce, Nd; X=Cl, I) and their mixtures in alkali halide eutectic solvents ((LiX-KX)eu; X=Cl, I) are presented.

    The main results can be summarized as follows:

    - The Raman spectra of following trihalide systems have been measured for the first time: CeCl3, CeI3, NdI3 and their mixtures in the respective alkali halide eutectic solvent. The structure of the LnX3 in the solvent can be characterized by octahedral complexes. The force constants decrease from the chlorides to the iodides.

    - The Raman spectra of the following dihalides have been observed in this work: NdCl2, CeI2 and their mixtures in the alkali halide solvent. Interestingly, CeCl2 might form as intermediate species on doping CeCl3 with Ce. It is not a stable compound in the Ce-CeCl3 phase diagram.

    - With respect to the above mentioned main objective the following conclusions can be drawn:

    (i) On mixing of NdCl2 with NdCl3 in (LiCl-KCl)eu the undisturbed spectra of both components can be observed simultaneously. This is in agreement with the suggested intervalence charge transfer hopping mechanism if one assumes a hopping rate below 1012.

    (ii) Even though CeCl2 might form as intermediate, in the equilibrium spectra of liquid Ce-CeCl3-(LiCl-KCl)eu only the typical - 36 CeCl -octahedra can be identified. This supports the assumption that in these systems the electronic defect states are probably mobile Drude-like electrons which do not lead to new Raman detectable species. A qualitatively similar observation was made for CeI2-CeI3-(LiI-KI)eu melts.

    Wikipedia Concepts

    These are words or phrases in the text that have been automatically identified by the Named Entity Recognition and Disambiguation service, which provides Wikipedia () and Wikidata () links for these entities.

    Metrics:

    Empfohlene Zitierweise
    Rodriguez Betancourtt, V. 2004. Raman spectroscopic study of high temperature rare earth metal - rare earth halide solutions: Ln-LnX3- and LnX2-LnX3-(LiX-KX)eu systems (Ln: Nd, Ce; X: Cl, I) [online]. Karlsruhe: KIT Scientific Publishing. DOI: https://doi.org/10.5445/KSP/3662003
    Rodriguez Betancourtt, V.M., 2004. Raman spectroscopic study of high temperature rare earth metal - rare earth halide solutions: Ln-LnX3- and LnX2-LnX3-(LiX-KX)eu systems (Ln: Nd, Ce; X: Cl, I) [online]. Karlsruhe: KIT Scientific Publishing. DOI: https://doi.org/10.5445/KSP/3662003
    Rodriguez Betancourtt, V M. Raman Spectroscopic Study of High Temperature Rare Earth Metal - Rare Earth Halide Solutions: Ln-lnx3- and Lnx2-lnx3-(lix-kx)eu Systems (ln: Nd, Ce; X: Cl, I) [online]. KIT Scientific Publishing, 2004. DOI: https://doi.org/10.5445/KSP/3662003
    Rodriguez Betancourtt, V. M. (2004). Raman spectroscopic study of high temperature rare earth metal - rare earth halide solutions: Ln-LnX3- and LnX2-LnX3-(LiX-KX)eu systems (Ln: Nd, Ce; X: Cl, I) [online]. Karlsruhe: KIT Scientific Publishing. DOI: https://doi.org/10.5445/KSP/3662003
    Rodriguez Betancourtt, V.M.. 2004. Raman Spectroscopic Study of High Temperature Rare Earth Metal - Rare Earth Halide Solutions: Ln-lnx3- and Lnx2-lnx3-(lix-kx)eu Systems (ln: Nd, Ce; X: Cl, I) [online]. Karlsruhe: KIT Scientific Publishing. DOI: https://doi.org/10.5445/KSP/3662003




    Export to:




    Lizenz

    This book is distributed under the terms of the Creative Commons Attribution + ShareAlike 4.0 license. Copyright is retained by the author(s)

    Peer Review Informationen

    Dieses Buch ist Peer reviewed. Informationen dazu finden Sie hier

    Weitere Informationen

    Veröffentlicht am 23. April 2004

    Sprache

    Englisch

    Seitenanzahl:

    143

    ISBN
    Paperback 3-937300-03-1

    DOI
    https://doi.org/10.5445/KSP/3662003