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    Crystal structure and in situ decomposition of Eu(BH4)2 and Sm(BH4)2

    Access Status
    Fulltext not available
    Authors
    Humphries, Terry
    Ley, M.
    Frommen, C.
    Munroe, K.
    Jensen, T.
    Hauback, B.
    Date
    2015
    Type
    Journal Article
    
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    Citation
    Humphries, T. and Ley, M. and Frommen, C. and Munroe, K. and Jensen, T. and Hauback, B. 2015. Crystal structure and in situ decomposition of Eu(BH4)2 and Sm(BH4)2. Journal of Materials Chemistry A. 3 (2): pp. 691-698.
    Source Title
    Journal of Materials Chemistry A
    DOI
    10.1039/c4ta04080e
    ISSN
    2050-7488
    School
    Department of Physics and Astronomy
    URI
    http://hdl.handle.net/20.500.11937/2879
    Collection
    • Curtin Research Publications
    Abstract

    Synthesis of halide free rare earth metal (RE) borohydride complexes is demonstrated by the metathesis reaction of trivalent RE metal chlorides and LiBH4 in ethereal solution, combined with solvent extraction using dimethyl sulfide. The crystal structures of Eu(BH4)2 and Sm(BH4)2 are orthorhombic (space group Pbcn) and are shown to be related to the structure of Sr(BH4)2 by Rietveld refinement. Further, the thermal decomposition of these materials has been studied by in situ synchrotron radiation powder X-ray diffraction, differential scanning calorimetry, thermogravimetric analysis, mass spectrometry and Sieverts measurements. The decomposition pathway of these solvent extracted materials has been compared against materials prepared by mechano-chemistry, the process of which is simplified by the absence of chloride impurities.

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