Chemical elements
  Antimony
    Isotopes
    Energy
    Production
    Application
    Physical Properties
    Chemical Properties
    Compounds
      Antimony Trihydride
      Antimony Trifluoride
      Antimony Pentafluoride
      Antimony Trichloride
      Oxychlorides of Tervalent Antimony
      Antimony Tetrachloride
      Antimony Pentachloride
      Chloroantimonic Acids
      Antimonyl Perchlorate
      Antimony Tribromide
      Antimony Oxybromides
      Antimony Pentabromide
      Antimony Triiodide
      Antimony Oxyiodide or Antimonyl Iodide
      Antimony Thioiodide
      Mixed Antimony Halides
      Antimony Trioxide
      Hydrated Antimony Trioxide
      Antimonites
      Antimony Tetroxide or Antimony Dioxide
      Antimony Pentoxide
      Antimony Trisulphide
      Antimony Pentasulphide
      Thioantimonates
      Normal Antimony Sulphate
      Potassium Stibiothiosulphate
      Antimony Selenate
      Antimony tritelluride
      Antimony Phosphide
      Antimonyl Dihydrogen Phosphite
      Antimony Phosphate
      Antimony Pyrophosphate
      Antimony Thiophosphate
    PDB 1exi-2xqa

Normal Antimony Sulphate, Sb2(SO4)3






Normal Antimony Sulphate, Sb2(SO4)3, may be obtained by crystallisation from a hot solution of antimony trioxide in concentrated sulphuric acid, or by the action of concentrated sulphuric acid upon antimony trisulphide or antimony sulphide ore. It crystallises in thin, four-sided prisms, density 3.6246. It is stable in dry air, but deliquesces in moist air. It is decomposed by water, forming a variety of basic compounds. It absorbs dry hydrogen chloride, and may perhaps form a complex chlorosulphate. It forms double salts, of the general formula SbM'(SO4)2, with the sulphates of the alkali metals, the alkaline earth metals and silver.

Many basic sulphates of antimony have been described, among them being the compounds 7Sb2O3.SO3; 7Sb2O3.2SO3; 2Sb2O3.SO3; (SbO)2SO4; 3Sb2O3.5SO3; Sb2O3.2SO3. They are obtained by the decomposition of normal antimony sulphate by water. Basic sulphates have also been obtained by fusing either antimony or antimony trisulphide with potassium hydrogen sulphate.

By the action of fuming sulphuric acid on antimony trioxide, an acid sulphate, Sb2O3.4SO3, has been obtained in the form of small, brilliant, granular crystals, readily decomposed by water.

By adding a hydrochloric acid solution of antimony trioxide to one containing a mixture of sodium thiosulphate and the chloride of an alkali or alkaline earth metal, several metallic antimony thiosulphates, or stibiothiosulphates, have been obtained. The mixture is maintained at a temperature of about 3° C. These salts, with the exception of those of sodium, calcium and strontium, may be crystallised out by the addition of alcohol.


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