Chemical elements
  Thorium
    Isotopes
    Energy
    Production
    Application
    Physical Properties
    Chemical Properties
      Thorium Hydride
      Thorium Fluoride
      Thorium Oxyfluoride
      Potassium Thorifluoride
      Thorium Chloride
      Thorium Oxychloride
      Complex Thorium Chlorides
      Thorium Bromide
      Thorium Oxybromide
      Thorium Iodide
      Thorium Dioxide
      Thoria
      Metathorium Oxide
      Thorium Hydroxide
      Thorium Superoxide
      Thorium Sulphide
      Thorium Sulphite
      Thorium Sulphate
      Complex Thorium Sulphates
      Thorium Selenite
      Thorium Selenate
      Thorium Nitride
      Thorium Nitrate
      Thorium Orthophosphate
      Thorium Arsenates
      Thorium Carbide
      Thorium Carbonate
      Thorium Formate
      Thorium Acetate
      Thorium Oxalate
      Thorium Tartrate
      Thorium Acetylacetone
      Thorium Silicide
      Thorium Silicate
      Thorium Borides

Thorium Silicide, ThSi2






Thorium Silicide, ThSi2, is prepared by heating in a magnesia crucible, to 1200° C., an intimate mixture of 15 grams potassium thorifluoride, 60 grams potassium silicifluoride, and 50 grams aluminium, the product being freed from aluminium and silicon by treatment with potassium carbonate solution. It may also be prepared by heating a mixture of thoria and silicon in an electric furnace, or by heating a mixture of aluminium, silicon, and thorium to 1000° C. It forms quadratic plates, resembling graphite, and has a density of 7.96 at 16° C. It is soluble in aqueous mineral acids, but not in aqueous alkalis.


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