Chemical elements
    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
      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

Potassium Thorifluoride, K2ThF6.4H2O

Potassium Thorifluoride, K2ThF6.4H2O, is formed as an amorphous, insoluble powder when freshly precipitated thorium hydroxide is boiled with a concentrated solution of potassium fluoride containing hydrofluoric acid. The precipitate obtained by adding thorium chloride to potassium hydrogen fluoride solution is possibly KTh2F9.6H2O, whilst with neutral potassium fluoride the product is KThF5.H2O. When thorium fluoride and potassium fluoride are fused together and the mass is extracted with water KThF5 remains; and when acidified rubidium fluoride is added to a thorium salt solution RbThF5.3H2O is precipitated. The amorphous and insoluble natures of these compounds differentiate them from other double or complex fluorides of the fourth group.

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