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6.7C: Intermetallic Compounds

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  • Intermetallic compounds are solid phases containing two or more metallic elements, with optionally one or more non-metallic elements, whose crystal structure differs from that of the other constituents. Under this definition the following are included

    • Electron (or Hume-Rothery) compounds
    • Size packing phases. e.g. Laves phases, Frank–Kasper phases and Nowotny phases
    • Zintl phases

    The definition of a metal is taken to include:

    • the so-called post-transition metals, i.e. aluminium, gallium, indium, thallium, tin and lead
    • some, if not all, of the metalloids, e.g. silicon, germanium, arsenic, antimony and tellurium.


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