Chemical elements
    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

Gold monoxide, AuO

An Gold monoxide, AuO, is said to be formed by the action on gold of a small proportion of aqua regia containing excess of hydrochloric acid, addition of sufficient primary carbonate to the solution to redissolve the precipitate first formed, and heating the solution. The product separates as an olive-green hydrate, which dries in the air to a hard mass. It is doubtful whether the oxide is a true chemical compound or not.

A hydrated gold oxide of the formula Au3O2(OH)2 is prepared by the action of boiling water on the monosulphate, AuSO4. It is a deep-black powder, decomposed at 160° to 205° C.

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