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    Complex transition metal hydrides incorporating ionic hydrogen: Synthesis and characterization of Na2Mg2FeH8 and Na2Mg2RuH8

    232158_232158.pdf (1.356Mb)
    Access Status
    Open access
    Authors
    Humphries, Terry
    Takagi, S.
    Li, G.
    Matsuo, M.
    Sato, T.
    Sørby, M.
    Deledda, S.
    Hauback, B.
    Orimo, S.
    Date
    2015
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Humphries, T. and Takagi, S. and Li, G. and Matsuo, M. and Sato, T. and Sørby, M. and Deledda, S. et al. 2015. Complex transition metal hydrides incorporating ionic hydrogen: Synthesis and characterization of Na2Mg2FeH8 and Na2Mg2RuH8. Journal of Alloys and Compounds. 645 (S1): pp. S347-S352.
    Source Title
    Journal of Alloys and Compounds
    DOI
    10.1016/j.jallcom.2014.12.113
    ISSN
    0925-8388
    School
    Department of Physics and Astronomy
    URI
    http://hdl.handle.net/20.500.11937/28487
    Collection
    • Curtin Research Publications
    Abstract

    A new class of quaternary complex transition metal hydrides (Na2Mg2TH8 (T = Fe, Ru)) have been synthesized and their structures determined by combined synchrotron radiation X-ray and powder neutron diffraction. The compounds can be considered as a link between ionic and complex hydrides in terms of incorporating independently coordinated ionic and covalent hydrogen. These novel isostructural complex transition metal hydrides crystallize in the orthorhombic space group Pbam, where the octahedral complex hydride anion is surrounded by a cubic array of four Mg2+ and four Na+ cations, forming distinct two-dimensional layers. An intriguing feature of these materials is the distorted octahedral coordination of the isolated H− anions by four Na+ and two Mg2+ cations, which form layers between the transition metal containing layers. The vibrational modes of the H− anions and complex hydride anion are independently observed for the first time in a quaternary complex transition metal hydride system by Raman and IR spectroscopy.

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