Chemical elements
  Beryllium
    Isotopes
    Energy
    Production
    Application
    Physical Properties
    Chemical Properties
      Beryllium Hydride
      Beryllium Fluoride
      Beryllium Chloride
      Beryllium Bromide
      Beryllium Iodide
      Beryllium Double Halides
      Beryllium Oxyhalides
      Beryllium Oxide
      Beryllium Hydroxide
      Beryllium Beryllate
      Beryllium Peroxide
      Beryllium Sulphide
      Beryllium Sulphide
      Beryllium Double Sulphates
      Beryllium Sulphite
      Beryllium Thiosulphate
      Beryllium Selenate
      Beryllium Chromate
      Beryllium Hydride
      Beryllium Chromite
      Beryllium Molybdate
      Beryllium Nitride
      Beryllium Azide
      Beryllium Nitrate
      Beryllium Phosphates, Phosphite, and Hypophosphite
      Beryllium Hypophosphate
      Beryllium Arsenates
      Beryllium Arsenite
      Beryllium Antimonate
      Beryllium Hydride
      Beryllium Vanadates
      Beryllium Niobate
      Beryllium Carbide
      Beryllium Borocarbide
      Beryllium Carbonate
      Beryllium Acetate
      Beryllium Oxalates
      Beryllium Cyanide
      Beryllium Platinocyanide
      Beryllium Silicates
      Beryllium Silicotungstate
      Beryllium Borate
      Beryllium Aluminate

Beryllium Carbide, Be2C






Beryllium Carbide, Be2C, was described by Lebeau as transparent, yellowish-brown, microscopic crystals which scratch quartz and have a density of 1.9 at 15° C. He prepared it by heating beryllia and carbon in an electric furnace. This compound is attacked in the heat by chlorine, bromine, hydrogen fluoride, hydrogen chloride, concentrated sulphuric acid, fused potassium hydroxide, potassium permanganate, lead peroxide, slowly by concentrated nitric and hydrochloric acids, and superficially by oxygen. Contact with water or dilute acids slowly liberates methane.

Lebeau originally assigned to it the formula Be4C3, emphasised its similarity to aluminium carbide, and noted that it pointed to an atomic weight of 13.8 for beryllium. Henry's formula, Be2C, is now accepted.

It reacts with nitrogen at 1250° C. and with ammonia at about 1000° C. -

3Be2C+2N2 = 2Be3N2+3C.


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