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Caesium superoxide

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Caesium superoxide

Caesium superoxide is a chemical compound with the chemical formula CsO2. It consists of caesium cations Cs+ and superoxide anions O2. It is an orange solid.

Burning caesium in excess oxygen will produce caesium superoxide.

Caesium superoxide's crystal structure is same as calcium carbide. It contains direct oxygen-oxygen bonding.

It reacts with water to form hydrogen peroxide and caesium hydroxide.

Heating to approximately 400 °C induces thermal decomposition to caesium peroxide.

The standard enthalpy of formation ΔHf0 of caesium superoxide is −295 kJ/mol.

Caesium superoxide reacts with ozone to form caesium ozonide.

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