Chemical elements
  Gold
    Isotopes
    Energy
    Production
    Extraction
    Application
    Physical Properties
    Chemical Properties
      Aurous fluoride
      Aurous chloride
      Aurous bromide
      Aurous iodide
      Aurous oxide
      Aurous sulphide
      Aurous thiosulphate
      Aurous Derivatives of Nitrogen
      Aurous cyanide
      Potassium aurothiocyanate
      Ammonia and Aurous Halides
      Gold dichloride
      Gold dibromide
      Gold monoxide
      Gold monosulphide
      Gold monosulphate
      Nitride of Bivalent Gold
      Auric chloride
      Aurichloric Acid
      Auric bromide
      Auribromic Acid
      Auric iodide
      Auri-iodic Acid
      Auric iodate
      Auric hydroxide
      Auric sulphide
      Auric sulphate
      Acid auryl sulphate
      Auric selenide
      Auric selenate
      Auric telluride
      Gold and Nitrogen
      Auric nitrates
      Gold and Phosphorus
      Gold arsenides
      Auric selenide
      Auric antimonide
      Auric cyanide
      Salts of Auricyanic Acid
      Double Salts of Auric thiocyanate
      Gold carbide
      Gold and Silicon
    PDB 1a52-4acl

Aurous iodide, AuI






The iodide is produced by decomposition of auric iodide at ordinary temperature; by the interaction of auric oxide and hydriodic acid; by precipitation of auric chloride with potassium iodide, hydrogen iodide, or ferrous iodide; by the interaction of gold and iodine in ether solution or in a sealed tube at 50° C., or ferric iodide, or manganese tetraiodide; by boiling powdered gold with hydriodic acid and nitric acid, filtering, and pouring the hot filtrate into aqueous hydriodic acid; and by the interaction of aurous chloride and potassium iodide.

Aurous iodide is a lemon-yellow powder, and is very difficult to prepare in the pure state, as it is decomposed by moist air at ordinary temperatures. The excess of iodine is best eliminated by sublimation at 30° C. It is decomposed by heating with water, dilute sulphuric acid, and nitric acid, although not so readily as the corresponding chloride and bromide. Chlorine and bromine exert an oxidizing action, liberating iodine and forming auric compounds. Potassium hydroxide precipitates metallic gold, producing potassium iodide and iodate. Alcohol, ether, and other organic compounds cause precipitation of metallic gold. The iodide dissolves readily in potassium-iodide solution, probably with formation of complex anions.


© Copyright 2008-2012 by atomistry.com