Caesium cations, Cs+ Superoxide anions, O−2 | |
Identifiers | |
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3D model (
JSmol)
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Properties | |
CsO2 | |
Molar mass | 164.903 g·mol−1 |
Appearance | Yellow to orange solid [1] |
Density | 3.77 g/cm3 [1] |
Melting point | 600 °C [2] |
reacts | |
Related compounds | |
Other
anions
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Other
cations
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Except where otherwise noted, data are given for materials in their
standard state (at 25 °C [77 °F], 100 kPa).
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Caesium superoxide is a chemical compound with the chemical formula CsO2. It consists of caesium cations Cs+ and superoxide anions O−2. It is an orange solid.
Burning caesium in excess oxygen will produce caesium superoxide. [2]
Caesium superoxide's crystal structure is same as calcium carbide. It contains direct oxygen-oxygen bonding. [2]
It reacts with water to form hydrogen peroxide and caesium hydroxide. [2]
Heating to approximately 400 °C induces thermal decomposition to caesium peroxide. [3]
The standard enthalpy of formation ΔHf0 of caesium superoxide is −295 kJ/mol. [4]
Caesium superoxide reacts with ozone to form caesium ozonide. [2]