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 Carbonate






The normal salt is unknown; a basic carbonate, (BiO)2CO3, is precipitated, however, as a white powder when sodium carbonate is added to a solution of bismuth nitrate. When dried it retains from one-half to one molecule of water. The density of the product varies with the concentration and temperature of the solutions; the product of lowest density is obtained at 45° C. The basic carbonate may also be prepared from a solution of bismuth nitrate containing mannitol. An electrolytic method has also been described. The electrolyte is a 3 per cent, solution of sodium chlorate charged with excess of carbon dioxide; the anode is of bismuth and the cathode of carbon, zinc, iron or aluminium.

It has been suggested that the composition of basic bismuth carbonate is in most cases more accurately represented by the formula CO(O.BiO)2.

It is insoluble in water even in the presence of carbon dioxide; it is also insoluble in alkalis, but is slightly soluble in alkali carbonates. From these solutions it may be reprecipitated either by boiling, or by the addition of an alkali. It darkens in colour on exposure to light. It is used principally in medicinal preparations.

Basic bismuth carbonate occurs naturally in the minerals bismutite, basobismutite and bismutosphaerite.
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