Chemical elements
  Lanthanum
    Isotopes
    Energy
    Production
    Application
    Chemical properties
      Lanthanum chloride
      Lanthanum iodide
      Lanthanum perchlorate
      Lanthanum bromate
      Lanthanum iodate
      Lanthanum periodate
      Lanthanum sesquioxide
      Lanthana
      Lanthanum hydroxide
      Lanthanum peroxide
      Lanthanum persulphide
      Lanthanum sulphate
      Lanthanum dithionate
      Lanthanum selenite
      Lanthanum selenate
      Lanthanum chromate
      Lanthanum azide
      Lanthanum hydrazoate
      Lanthanum trinitride
      Lanthanum nitrate
      Lanthanum phosphite
      Lanthanum orthophosphate
      Lanthanum hydrogen pyrophosphate
      Lanthanum metaphosphate
      Lanthanum arsenates
      Lanthanum carbonate
      Lanthanum thiocyanate
      Lanthanum platinocyanide
      Lanthanum acetate
      Lanthanum oxalate
    PDB 1djg-2rpv

Lanthanum sesquioxide, LaO3






Lanthanum sesquioxide, or lanthana, La2O3, is obtained as a white powder by the ignition of the hydroxide, carbonate, nitrate, oxalate, etc. The strongly ignited oxide has a density of 6.53 at 17° (Cleve), 5.94 (Hermann). It is slightly diamagnetic; the specific heat between 0° and 100° is 0.0749. The powder rapidly absorbs water, with the evolution of heat, and it also combines readily with carbon dioxide. The oxide crystallises in the form of hexagonal bipyramids of density 5.30 when dissolved in borax at a white heat and slowly cooled; the crystals are not affected by water.

Lanthana, even after intense ignition, is readily soluble in acids.
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