Chemistry:Caesium peroxide
From HandWiki
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| Names | |
|---|---|
| IUPAC name
Caesium peroxide
| |
| Identifiers | |
| 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). | |
| Infobox references | |
Caesium peroxide or cesium peroxide is an inorganic compound of caesium and oxygen with the chemical formula Cs
2O
2. It can be formed from caesium metal by adding a stoichiometric amount in ammonia solution, or oxidizing the solid metal directly.[1]
- 2 Cs + O
2 → Cs
2O
2
It can also be formed by the thermal decomposition of caesium superoxide:[3]
- 2 CsO
2 → Cs
2O
2 + O
2
Upon heating until 650 °C, the compound will decompose to caesium monoxide and atomic oxygen:[4]
- Cs
2O
2 → Cs
2O + [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
- ↑ 1.0 1.1 I. I. Volnov (2012). Peroxides, Superoxides, and Ozonides of Alkali and Alkaline Earth Metals. Springer. p. 45. ISBN 9781468482522.
- ↑ Band, A.; Albu-Yaron, A.; Livneh, T.; Cohen, H.; Feldman, Y.; Shimon, L.; Popovitz-Biro, R.; Lyahovitskaya, V. et al. (2004-07-27). "Characterization of Oxides of Cesium". The Journal of Physical Chemistry B (American Chemical Society (ACS)) 108 (33): 12360–12367. doi:10.1021/jp036432o. ISSN 1520-6106.
- ↑ Berardinelli, S. P.; Kraus, D. L. (1974-01-01). "Thermal decomposition of the higher oxides of cesium in the temperature range 320-500.deg.". Inorganic Chemistry (American Chemical Society (ACS)) 13 (1): 189–191. doi:10.1021/ic50131a037. ISSN 0020-1669.
- ↑ Zefirov, Nikolaj (1995) (in bs). Chimičeskaja ėnciklopedija : v pjati tomach. Moskva: Izdat.. p. 658. ISBN 5-85270-092-4. OCLC 258155382.
- ↑ Livneh, Tsachi; Band, Alisa; Tenne, Reshef (2002). "Raman scattering from the peroxide ion in Cs2O2". Journal of Raman Spectroscopy (Wiley) 33 (8): 675–676. doi:10.1002/jrs.900. ISSN 0377-0486. Bibcode: 2002JRSp...33..675L.
- ↑ Sun, Yun; Liu, Zhi; Pianetta, Piero; Lee, Dong-Ick (2007). "Formation of cesium peroxide and cesium superoxide on InP photocathodes activated by cesium and oxygen". Journal of Applied Physics (AIP Publishing) 102 (7): 074908–074908–6. doi:10.1063/1.2786882. ISSN 0021-8979. Bibcode: 2007JAP...102g4908S.
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