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 Sulphide, GeS2






Germanic Sulphide, GeS2, probably occurs naturally in argyrodite. It is obtained as a voluminous white precipitate by passing hydrogen sulphide through a solution of germanic oxide, or by adding mineral acid to a solution of germanous sulphide, GeS, in yellow ammonium sulphide. Weak organic acids, such as acetic acid, do not precipitate this solution owing to the stability of the complex thio-germanic ion which is present; and indeed a large excess of mineral acid must be used to complete the precipitation.

Germanium disulphide is a white powder difficult to wet with water, but soluble in 221.9 parts of water, forming a solution which will precipitate various less soluble metallic sulphides. The aqueous solution quickly decomposes, with evolution of hydrogen sulphide. This sulphide readily dissolves in alkali hydroxide solution with formation of thio-germanate, a derivative of thio-germanic acid which is probably H2GeS3.


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