Chemical elements
  Strontium
    Isotopes
    Energy
    Production
    Application
    Physical Properties
    Chemical Properties
      Strontium Hydride
      Strontium Fluoride
      Strontium Chloride
      Strontium Perchloride
      Strontium Bromide
      Strontium Perbromide
      Strontium Iodide
      Strontium Periodides
      Mixed Halides
      Strontium Oxychloride
      Strontium Hypochlorite
      Strontium Chlorite
      Strontium Chlorate
      Strontium Perchlorate
      Strontium Oxybromide
      Strontium Bromate
      Strontium Oxyiodide
      Strontium Iodate
      Strontium Periodate
      Strontium Manganite
      Strontium Manganate
      Strontium Permanganate
      Strontium Suboxide
      Strontium Oxide
      Strontium Hydroxide
      Strontium Peroxide
      Strontium Diperoxyhydrate
      Strontium Hydride
      Strontium Hydrosulphide
      Strontium Polysulphides
      Strontium Oxysulphide
      Strontium Thiosulphate
      Strontium Hyposulphite
      Strontium Sulphite
      Strontium Dithionate
      Strontium Tetrathionate
      Strontium Sulphate
      Acid Strontium Sulphate
      Strontium Pyrosulphate
      Strontium Selenide
      Strontium Selenite
      Strontium Selenate
      Strontium Telluride
      Strontium Tellurite
      Strontium Tellurate
      Strontium Chromate
      Strontium Dichromate
      Strontium Trichromate
      Strontium Chlorochromate
      Strontium Molybdate
      Complex Strontium Molybdates
      Strontium Tungstate
      Strontium Uranate
      Strontium Nitride
      Strontium Azide
      Strontium Ammonium
      Strontium Hexammoniate
      Strontium Amide
      Strontium Imide
      Strontium Imidosulphonate
      Strontium Hyponitrite
      Strontium Nitrohydroxylaminate
      Strontium Nitrite
      Strontium Nitrate
      Strontium Phosphide
      Strontium Dihydrohypophosphite
      Strontium Hydrophosphite
      Strontium Dihydrophosphite
      Strontium Orthophosphates
      Strontium Pyrophosphate
      Strontium Metaphosphate
      Basic Strontium Phosphate
      Strontium Arsenide
      Strontium Orthoarsenites
      Strontium Pyroarsenite
      Strontium Metarsenite
      Strontium Orthoarsenates
      Strontium Pyroarsenate
      Strontium Thioarsenites
      Strontium Thio-oxyarsenates
      Strontium Thioantimonite
      Strontium Antimonate
      Strontium Orthovanadate
      Strontium Metavanadate
      Strontium Pervanadate
      Strontium Carbide
      Strontium Carbonyl
      Strontium Formate
      Strontium Acetate
      Strontium Oxalate
      Strontium Carbonate
      Strontium Trithiocarbonate
      Strontium Perthiocarbonate
      Strontium Cyanide
      Strontium Cyanamide
      Strontium Thiocyanate
      Strontium Silicide
      Strontium Silicate
      Strontium Fluosilicate
      Strontium Stannate
      Strontium Orthoplumbate
      Strontium Titanate
      Strontium Zirconate
      Strontium Boride
      Strontium Borates
      Strontium Aluminates
      Strontium Ferrate
    PDB 1cs7-2spt
    PDB 2woh-4ds7

Strontium Peroxide, SrO2






Similarly to calcium peroxide, Strontium Peroxide, SrO2, was first obtained as a white crystalline precipitate in the hydrated form, SrO2.8H2O, by the action of hydrogen peroxide or sodium peroxide on strontium hydroxide. It is also formed when an alkali reacts with a strontium salt solution containing hydrogen peroxide. By heating to 130° C. in a current of dry air, or by drying in vacuo, the anhydrous compound is obtained, but it cannot be completely freed from water without partial decomposition. The anhydrous peroxide may be prepared directly by precipitating from very concentrated solutions above 50° C. Very large pressures are required in order to make strontium oxide combine directly with oxygen. Combination under a pressure of 76 atmospheres of oxygen is possible, but the maximum yield, 15-16 per cent, of peroxide, is obtained at about 400° C. under a pressure of 98 atmospheres.

The heat of formation from strontium oxide and oxygen is 10.875 Cal., or from metallic strontium and oxygen 153.07 Cal.

At red heat strontium peroxide melts and gives off oxygen. It is a white powder, only slightly soluble in water, by which it is partially decomposed, but soluble in acids. Anhydrous commercial strontium oxide contains 85 per cent, of strontium peroxide and 15 per cent, of strontium hydroxide, and has a density of 0.546. It is very stable in a dry atmosphere, and may be heated to 150° C. without loss of available oxygen.


Hydrates of Strontium Peroxide

The octahydrate is precipitated at ordinary temperatures from dilute solutions of strontium hydroxide and hydrogen peroxide. It has been suggested that the compound formed contains 9 molecules of water of crystallisation. The heat of hydration is 20.48 Cal. Hydrates containing 10 and 12 molecules of water have been mentioned.
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