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

Potassium Germanifluoride, K2GeF6






Potassium Germanifluoride (Fluogermanate), K2GeF6, is obtained in the course of extraction of germanium from argyrodite. It is best prepared1 by dissolving 2 parts of germanic oxide in 12 parts of a 20 per cent, solution of hydrofluoric acid and adding 3 parts of potassium chloride in concentrated solution. After first separating as a jelly the salt is eventually obtained in hexagonal crystals isomorphous with ammonium silicifluoride. According to Winkler 1 part of potassium germanifluoride dissolves in 174 parts of water at 18° C. and in 34 parts at 100° C.
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