Chemical elements
  Lithium
    Isotopes
    Energy
    Production
    Application
    Physical Properties
    Chemical Properties
      Lithium hydride
      Lithium chloride
      Lithium bromide
      Lithium iodide
      Lithium iodide tetrachloride
      Lithium hypochlorite
      Lithium chlorate
      Lithium perchlorate
      Lithium bromate
      Lithium iodate
      Lithium periodates
      Lithium monoxide
      Lithium peroxide
      Lithium hydroxide
      Lithium monosulphide
      Lithium polysulphides
      Lithium sulphite
      Lithium sulphate
      Lithium persulphate
      Lithium thiosulphate
      Lithium dithionate
      Lithium selenide
      Lithium selenite
      Lithium selenate
      Lithium chromate
      Lithium permanganate
      Lithium molybdates
      Lithium nitride
      Lithium hydrazoate
      Lithamide
      Lithium nitrite
      Lithium nitrate
      Lithium phosphide
      Lithium orthophosphate
      Lithium pyrophosphate
      Lithium metaphosphate
      Lithium arsenide
      Lithium meta-arsenite
      Lithium arsenate
      Lithium antimonide
      Lithium antimonate
      Lithium carbide
      Lithium carbonate
      Lithium percarbonate
      Lithium cyanide
      Lithium thiocyanate
      Lithium silicide
      Lithium silicates
      Lithium borates

Lithamide, LiNH2






The Lithamide, or lithium amide can be prepared by the action of lithium on liquefied ammonia, or by passing dry ammonia over the metal at 400° C. It is a white, crystalline substance of density 1.178 at 17.5° C., and melts without decomposition at 373° to 375° C. It is more stable than the amides of sodium and potassium. On heating, it partially sublimes, but in vacuum at 620° to 640° C. it is transformed into lithium imide. It is converted by water into the hydroxide and ammonia.

Several investigators have described products formed by the interaction of lithium and liquefied ammonia, but there seems to be a considerable measure of uncertainty as to the true nature of the reaction.

The mechanism of the action of hydrogen on lithium nitride is also a matter of dispute, trilithium amide, Li3NH2, and trilithium ammonium, Li3NH4, being products mentioned in the literature. Lithium imide, Li2NH, is a yellowish-white solid formed by the decomposition in sunlight of trilithium amide -

Li3NH2=Li2NH+LiH.


© Copyright 2008-2012 by atomistry.com