Chemical elements
  Tin
    Isotopes
    Energy
    Production
    Application
    Physical Properties
    Chemical Properties
      Tetramethyl Stannane
      Methyl stannic chloride
      Tin Tetra-ethyl
      Tin Tri-ethyl
      Stannous Fluoride
      Stannic Fluoride
      Sodium Stannifluoride
      Potassium Stannifluoride
      Ammonium Stannifluoride
      Stannous Chloride
      Stannic Chloride
      Chlorostannates
      Stannous Bromide
      Stannic Bromide
      Stannous Iodide
      Stannic Iodide
      Mixed Stannic Halides
      Stannous Oxide
      Stannous Hydroxide
      Stannic Oxide
      Potassium Stannate
      Stannic Acid and its Derivatives
      Parastannic Acid
      Stannyl Chloride
      Parastannyl Chloride
      Stannous Sulphide
      Stannic Sulphide
      Stannic Oxysulphide
      Stannic Iodosulphide
      Stannous Sulphate
      Stannic Sulphate
      Stannic Nitrate
      Stannous Nitrate
      Phosphor-tin
      Stannioxalic Acid
      Stannous Tartrate
      Tin and Silicon
      Stannous Tungstate
    PDB 3e94-3kwy

Potassium Stannifluoride, K2SnF6






Potassium Stannifluoride, K2SnF6.H2O, is obtained similarly to the sodium salt, or by adding potassium fluoride solution to stannic chloride. It is known in two forms, in octahedra and in leaflets. The former is the less soluble and more stable form at ordinary temperature; both forms are much more soluble in hot than in cold water. Hydrofluoric acid is evolved when this compound is treated with concentrated sulphuric acid.

The salts K2SnF6.KF.HF and K2SnF6.KF.3HF have been obtained by employing excess of hydrofluoric acid.


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