Caesium superoxide
Chemical compound From Wikipedia, the free encyclopedia
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.
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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Preparation
Burning caesium in excess oxygen will produce caesium superoxide.[2]
- Cs + O2 → CsO2
Properties
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]
- 2 CsO2 + 2 H2O → O2↑ + H2O2 + 2 CsOH
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]
- CsO2 + O3 → CsO3 + O2
References
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