Chemical elements
  Germanium
    Isotopes
    Energy
    Production
    Application
    Physical Properties
    Chemical Properties
      Germanium Hydride
      Germanium Tetra-ethyl
      Germanium Chloroform
      Germanous Fluoride
      Germanic Fluoride
      Hydrofluogermanic Acid
      Potassium Germanifluoride
      Fluogermanate
      Germanous Chloride
      Germanic Chloride
      Germanium Oxychloride
      Germanic Bromide
      Germanic Iodide
      Germanous Oxide
      Germanous Hydroxide
      Germanic Oxide
      Germanous Sulphide
      Germanic Sulphide
      Germanium Ultramarine

Germanic Fluoride, GeF4






Germanic Fluoride, GeF4, has not been obtained in a pure anhydrous state, but is probably formed when the crystallohydrate GeF4.3H2O is heated in a stream of carbon dioxide, as well as when a mixture of germanic oxide, calcium fluoride, and sulphuric acid is distilled.

The hydrate GeF4.3H2O is obtained in large crystals when a solution of the dioxide in aqueous hydrofluoric acid is evaporated over sulphuric acid. These crystals are hygroscopic and easily dissolve in water; the solution, however, suffers hydrolysis, so that glass is etched by the liberated hydrofluoric acid.
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