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 Oxalates






Beryllium oxalate trihydrate, BeC2O4.3H2O, can be prepared by dissolving basic beryllium carbonate in rather more than an equivalent amount of oxalic acid. On crystallising, oxalic acid crystals separate first, then crystals of beryllium oxalate. Even after nine recrystallisations the latter contain occluded oxalic acid. In the sufficiently recrystallised product the neutralisation of the occluded acid by exactly enough basic beryllium carbonate produces the pure normal oxalate. It crystallises in orthorhombic crystals, is stable at room temperature, very soluble in water, acid in reaction, sharp and sweet in taste, and readily decomposed by heat. 100 c.c. water at 25° C. dissolve 63.2 grm.; oxalic acid dissolves it more readily.

At 100°-105° C. the trihydrate passes into the monohydrate, which is stable in dry air. It loses water slowly above 105° C. and rapidly towards 220° C. Decomposition begins near the latter temperature, and at 350° C. the salt is completely converted into the oxide.

Other oxalates, basic and acid, which have been described, apparently do not exist.


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