Caesium peroxide
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.
- 2 Cs + O2 → Cs2O2
| Names | |
|---|---|
| IUPAC name
Caesium peroxide | |
| Identifiers | |
| Properties | |
| Cs2O2 | |
| Molar mass | 297.809 g·mol−1 |
| Appearance | Yellowish |
| Structure | |
| Orthorhombic | |
| Related compounds | |
Other cations |
|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references | |
It can also be formed by the thermal decomposition of caesium superoxide:
- 2 CsO2 → Cs2O2 + O2
Upon heating until 650 °C, the compound will decompose to caesium monoxide and atomic oxygen:
- Cs2O2 → Cs2O + [O]
Caesium peroxide shows a Raman vibration at 743 cm−1, due to the presence of the peroxide ions. The compound is often used as a coating for photocathodes, due to its low work function.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.