Chemical elements
    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 Oxyhalides

The perchlorate, BeClO4.4H2O, seems to be the only oxyhalide definitely known. Atterberg mentions the decomposition of the chlorate on evaporating its solution. He describes the perchlorate as needle-shaped, deliquescent crystals, with 4 molecules of water of crystallisation.7 Marignac says it is very deliquescent, and only crystallises on concentrating its solution to a thick syrup. It is prepared by dissolving beryllium hydroxide in excess of perchloric acid and concentrating the solution.

Atterberg refers to a "gummy mass " of beryllium iodate and to a periodate, 3BeO.I2O7 + 11 or 13H2O, which is nearly insoluble in pure water.

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