Chemical elements
  Silver
    Isotopes
    Energy
    Production
    Application
    Physical Properties
    Chemical Properties
      Silver fluoride
      Silver subfluoride
      Silver chloride
      Silver subchloride
      Photohalides
      Silver bromide
      Silver oxybromide
      Silver subbromide
      Silver iodide
      Silver hypochlorite
      Silver chlorite
      Silver chlorate
      Silver perchlorate
      Silver bromate
      Silver perbromate
      Silver iodate
      Silver periodates
      Silver suboxide
      Silver monoxide
      Higher oxides
      Silver subsulphide
      Silver sulphide
      Silver sulphite
      Silver sulphate
      Silver selenide
      Silver telluride
      Silver thiosulphate
      Silver dithionate
      Silver azide
      Silver hyponitrite
      Silver nitrite
      Silver nitrate
      Silver phosphides
      Silver hypophosphate
      Silver orthophosphate
      Silver pyrophosphate
      Silver metaphosphate
      Silver arsenite
      Silver arsenate
      Silver carbide
      Silver carbonate
      Silver cyanide
      Silver thiocyanate
      Silver borate
    PDB 1aoo-3kso

Silver fluoride, AgF






Evaporation in vacuum of a solution of silver oxide in hydrofluoric acid yields the Silver fluoride, AgF, in the form of an amorphous, yellow mass, of density 5.852 at 15.5° C. At red heat it melts to a black liquid, which on cooling solidifies to a crystalline mass. It is very soluble in water, its solubility at 15.5° C. being 181.8 grams per 100 grams of water. The solution has a neutral reaction. In its solubility the fluoride presents a marked contrast to the other silver halides. The anhydrous salt can absorb 844 times its volume of ammonia.

Two hydrates have been described. The monohydrate, AgF,H2O, forms yellowish cubes,4 or large, deliquescent, tetragonal crystals, decomposed by heat with formation of a basic salt, Ag2F(OH), and evolution of hydrogen fluoride. The dihydrate, AgF,2H2O, crystallizes from concentrated solution in hard, transparent prisms.

From a solution of the fluoride in dilute hydrofluoric acid there crystallizes an acid salt, AgF,HF, in brown, deliquescent crystals. On cooling, a solution of the fluoride in pure hydrogen fluoride deposits white crystals of the formula AgF,3HF.

An aqueous solution containing 0.0002 per cent, of silver fluoride has been employed as a sterilizer to render water potable. The salt is sensitive to light.


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