Nomenclature
CAS number: 1301-96-8
Argentic oxide; silver peroxide; silver suboxide; Divasil.
AgO; mol wt 123.87.
Ag 87.08%, O 12.92%.
Description and references
Is actually a silver(I)-silver(III) oxide:
McMillan, Chem. Rev. 62, 65 (1962). Prepd by the oxidation of silver nitrate with potassium
peroxydisulfate in an alk medium: Hammer, Kleinberg, Inorg. Synth. 4, 12 (1953). Prepn
of single crystals: Chem. Eng. News 47, 32 (Aug 11, 1969).
Properties
Charcoal-gray powder. Avoid contact with skin, organic matter, strong ammonia and alkalies. Malleable. Cubic or orthorhombic system when cryst. d425 7.483.
The dry solid is stable at 100° for 18 hrs, dec above 100° into silver
and oxygen. Possesses semiconductor properties and is diamagnetic.
Strong oxidizing agent. Ka 7.9 ×
10-13. Practically insol in water: 27 mg/l at 25° (decompn).
Sol in alkalies and NH4OH (with decompn and evolution
of N2). In dil acids oxygen is evolved immediately, in
concd acid intensely colored solns are formed (brown in nitric acid
and olive green in sulfuric acid).Caution
Highly irritating to skin, eyes,
mucous membranes, respiratory tract.Use
In the manuf of silver oxide-zinc alkali batteries.