過酸化セシウムのソースを表示

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| CASNo          = 12053-70-2
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| Section2       = {{Chembox Properties
| Formula        = Cs<sub>2</sub>O<sub>2</sub>
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| Appearance     = 黄色<ref name=Volnov>{{cite book|title=Peroxides, Superoxides, and Ozonides of Alkali and Alkaline Earth Metals|author= I. I. Volnov|publisher=Springer|year=2012|page=45|isbn=9781468482522}}</ref>
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| Section3       = {{Chembox Structure
| Coordination   = 
| CrystalStruct  = 斜方晶<ref>{{cite journal | last1=Band | first1=A. | last2=Albu-Yaron | first2=A. | last3=Livneh | first3=T. | last4=Cohen | first4=H. | last5=Feldman | first5=Y. | last6=Shimon | first6=L. | last7=Popovitz-Biro | first7=R. | last8=Lyahovitskaya | first8=V. | last9=Tenne | first9=R. | title=Characterization of Oxides of Cesium | journal=The Journal of Physical Chemistry B | publisher=American Chemical Society (ACS) | volume=108 | issue=33 | date=2004-07-27 | issn=1520-6106 | doi=10.1021/jp036432o | pages=12360–12367}}</ref>
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| Section8       = {{Chembox Related
| OtherAnions = 
| OtherCations = [[過酸化リチウム]] <br> [[過酸化ナトリウム]] <br> [[過酸化カリウム]] <br> [[過酸化ルビジウム]]
| OtherFunction = [[酸化二セシウム]]<br>[[一酸化セシウム]]<br>[[二酸化三セシウム]]<br>[[超酸化セシウム]]<br>[[オゾン化セシウム]]
| OtherFunction_label = [[セシウム]] [[酸化物]]
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'''過酸化セシウム'''(Caesium peroxide)は、[[酸素]]と[[セシウム]]からなる化合物である。金属セシウムに[[アンモニア]]溶液を[[化学量論]]量加えるか、固体の金属セシウムを直接[[酸化]]することで形成される<ref name=Volnov />。
:2Cs + O<sub>2</sub> → Cs<sub>2</sub>O<sub>2</sub>

また、[[超酸化セシウム]]を[[熱分解]]することでも形成される<ref>{{cite journal | last1=Berardinelli | first1=S. P. | last2=Kraus | first2=D. L. | title=Thermal decomposition of the higher oxides of cesium in the temperature range 320-500.deg. | journal=Inorganic Chemistry | publisher=American Chemical Society (ACS) | volume=13 | issue=1 | date=1974-01-01 | issn=0020-1669 | doi=10.1021/ic50131a037 | pages=189–191}}</ref>。
:2CsO<sub>2</sub> → Cs<sub>2</sub>O<sub>2</sub> + O<sub>2</sub>

650℃まで加熱すると、酸化セシウムと原子状酸素に分解する<ref>{{cite book | last=Zefirov | first=Nikolaj | title=Chimičeskaja ėnciklopedija : v pjati tomach | publisher=Izdat. | publication-place=Moskva | year=1995 | isbn=5-85270-092-4 | oclc=258155382 | language=bs |page=658}}</ref>。
:<math>\mathsf{Cs_2O_2\rightarrow Cs_2O+[O]}</math>

[[過酸化物]]イオンの存在のため、743 cm<sup>-1</sup>に[[ラマン分光法|ラマン振動]]が見られる<ref>{{cite journal | last1=Livneh | first1=Tsachi | last2=Band | first2=Alisa | last3=Tenne | first3=Reshef | title=Raman scattering from the peroxide ion in Cs<sub>2</sub>O<sub>2</sub> | journal=Journal of Raman Spectroscopy | publisher=Wiley | volume=33 | issue=8 | year=2002 | issn=0377-0486 | doi=10.1002/jrs.900 | pages=675–676| bibcode=2002JRSp...33..675L }}</ref>。[[仕事関数]]が低いため、[[光電陰極]]のコーティングにしばしば用いられる<ref>{{cite journal | last1=Sun | first1=Yun | last2=Liu | first2=Zhi | last3=Pianetta | first3=Piero | last4=Lee | first4=Dong-Ick | title=Formation of cesium peroxide and cesium superoxide on InP photocathodes activated by cesium and oxygen | journal=Journal of Applied Physics | publisher=AIP Publishing | volume=102 | issue=7 | year=2007 | pages=074908–074908–6 | issn=0021-8979 | doi=10.1063/1.2786882 | bibcode=2007JAP...102g4908S }}</ref>。

==出典==
{{reflist}}

{{セシウムの化合物}}
{{デフォルトソート:かさんかせしうむ}}
[[Category:セシウムの化合物]]
[[Category:過酸化物]]