Caesium peroxide
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| Names | |
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| IUPAC name
Caesium peroxide
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| Identifiers | |
3D model (JSmol)
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CompTox Dashboard (EPA)
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| Properties | |
| Cs2O2 | |
| Molar mass | 297.809 g·mol−1 |
| Appearance | Yellowish[1] |
| Structure | |
| Orthorhombic[2] | |
| Related compounds | |
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 peroxide or cesium peroxide is an inorganic compound of caesium and oxygen with the chemical formula Cs2O2. It can be formed from caesium metal by adding a stoichiometric amount in ammonia solution, or oxidizing the solid metal directly.[1]
- 2 Cs + O2 → Cs2O2
It can also be formed by the thermal decomposition of caesium superoxide:[3]
- 2 CsO2 → Cs2O2 + O2
Upon heating until 650 °C, the compound will decompose to caesium monoxide and atomic oxygen:[4]
- Cs2O2 → Cs2O + [O]
Caesium peroxide shows a Raman vibration at 743 cm−1, due to the presence of the peroxide ions.[5] The compound is often used as a coating for photocathodes, due to its low work function.[6]
References
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External links
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