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 Sulphide, ThS2






Thorium Sulphide, ThS2, and Oxysulphide, ThOS. - Berzelius obtained a yellow powder and Nilson a black substance by heating thorium in sulphur vapour. Chydenius heated thoria to a high temperature in a stream of hydrogen containing carbon disulphide vapour, and obtained a black product having a density of 8.29. Kruss obtained a brown product, probably the oxysulphide, by the action of hydrogen sulphide on thorium halides; and Hauser prepared the same substance by heating carefully dried thorium sulphate to low redness in a current of hydrogen sulphide. Lastly, Duboin heated a mixture of thorium chloride with excess of sodium or potassium chloride in a porcelain boat contained in a tube through which a current of dry hydrogen sulphide was passed. The product, after washing out the alkali chloride, contained brown lamellae of thorium sulphide, ThS2, having a density of 6.7. After the removal of these lamellae by sifting, the siftings were treated with nitric acid at 40° C., which dissolved the remaining ThS2 and left the oxysulphide ThOS in the form of yellow crystals; these are only very slowly acted on by nitric acid, and have a density of 8.42.


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