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About: Polyhydride     Goto   Sponge   NotDistinct   Permalink

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A polyhydride or superhydride is a compound that contains an abnormally large amount of hydrogen. This can be described as high hydrogen stoichiometry. Examples include iron pentahydride FeH5, LiH6, and LiH7. By contrast, the more well known lithium hydride only has one hydrogen atom. Polyhydrides are only known to be stable under high pressure.