Chemical elements
  Bismuth
    Isotopes
    Energy
    Production
    Application
    Physical Properties
    Chemical Properties
      Bismuth Trihydride
      Bismuth Trifluoride
      Bismuthyl Fluoride
      Bismuth Trichloride
      Bismuth Oxychloride
      Bismuth Chlorate
      Bismuthyl Perchlorates
      Bismuth Thiochloride
      Bismuth Selenochloride
      Bismuth Dibromide
      Bismuth Tribromide
      Bismuth Oxybromide
      Bismuth Thiobromide
      Bismuth Diiodide
      Bismuth Triiodide
      Bismuth Oxyiodide
      Bismuth Iodate
      Bismuth Thioiodide
      Bismuth Monoxide
      Bismuth Trioxide
      Bismuth Hydroxide
      Bismuth Tetroxide
      Bismuth Pentoxide
      Bismuth Hexoxide
      Bismuth Monosulphide
      Bismuth Trisulphide
      Bismuth Sulphites
      Bismuth Sulphate
      Bismuth Thiosulphates
      Bismuth Triselenide
      Bismuth Chromite
      Bismuth Nitride
      Bismuthyl Nitrite
      Normal Bismuth Nitrate
      Basic Bismuth Nitrate
      Bismuth Phosphide
      Bismuth Hypophosphite
      Bismuth Phosphite
      Bismuth Orthophosphate
      Bismuth Pyrophosphate
      Bismuth Thiophosphate
      Bismuth Arsenide
      Bismuth Arsenite
      Bismuth Arsenate
      Bismuth Carbonate
      Bismuth Cyanides
      Bismuth Thiocyanate
      Bismuth Chromothiocyanate
      Bismuth Orthosilicate
    Detection and Estimation

Bismuth Monosulphide, BiS






Bismuth Monosulphide, BiS, is stated to be formed when hydrogen sulphide acts upon bismuth monoxide, either directly or in a solution containing stannous compounds and tartaric acid; also by heating a mixture of bismuth hydroxide with an aqueous solution of potassium cyanide and thiocyanate. Crystals have been obtained by melting together bismuth and sulphur and cooling the melt quickly. These crystals are stated by some to be bismuth monosulphide and by others to be a mixture of trisulphide and metal.

When prepared in the dry way, the product is a slate-grey powder with a density of 7.6 to 7.8 at 20° C.; prepared in the wet way it is a black, dull powder, which can be obtained in the anhydrous form by drying over sulphuric acid. When dried over a water-bath some water is still retained.

The monosulphide is moderately stable in air, but it yields sulphur dioxide when heated in air. It is attacked by hydrochloric acid, bismuth trichloride being formed in solution and spongy metallic bismuth precipitated. It is decomposed into metal and trisulphide when heated to red heat in dry carbon dioxide.
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