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 periodates






A solution of sodium periodate, Na4I2O9, gives with Silver nitrate a precipitate of a silver periodate. It crystallizes from dilute nitric acid in straw-coloured, hexagonal crystals of the formula 2Ag2O,I2O7,3H2O, transformed at 100° C. into the corresponding mono- hydrate, a dark-red, crystalline powder. Prolonged boiling of the trihydrate with water yields 3Ag2O,I2O7 or 5Ag2O,I2O7. The substance with the second formula is also produced as a black, crystalline powder by the action of Silver nitrate on the trihydrate. Evaporation with nitric acid converts the trihydrate into the yellow, crystalline anhydrous salt, Ag2O,I2O7. Ammonia transforms the trihydrate into a black powder, 4Ag2O,I2O7. The trihydrate, 2Ag2O,I2O7,3H2O, is also formed by the interaction at ordinary temperatures of Silver nitrate and a nitric-acid solution of the periodate Na2H3IO6. At 100° C. the action produces a black precipitate, 3Ag2O,I2O7.


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