 Caesium cations,Cs+ Superoxide anions,O−2 | |
| Identifiers | |
|---|---|
3D model (JSmol) | |
| |
| |
| 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 | |
| Thermochemistry | |
Std enthalpy of formation(ΔfH⦵298) | −295 kJ/mol[3] |
| Related compounds | |
Otheranions | |
Othercations | |
Except where otherwise noted, data are given for materials in theirstandard state (at 25 °C [77 °F], 100 kPa). | |
Caesium superoxide is achemical compound with thechemical formulaCsO2. It consists ofcaesiumcationsCs+ andsuperoxideanionsO−2. It is an orange solid.
Caesium superoxide'scrystal structure is same ascalcium carbide. It contains direct oxygen-oxygen bonding.[2]
Burning caesium in excessoxygen will produce caesium superoxide.[2]
Caesium superoxide reacts with water to formhydrogen peroxide andcaesium hydroxide.[2]
Heating to approximately 400 °C induces thermal decomposition tocaesium peroxide.[4][contradictory]
It reacts withozone to formcaesium ozonide.[2]
