Caesium oxide photograph

Caesium Oxide

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FormulaCs2O
Molar mass281. 81 g/mol
Melting point490 °C
Heat capacity (C)76. 0 J K−1 mol−1
Main hazardsCorrosive
Other cations Lithium oxide
Sodium oxide
Potassium oxide
Rubidium oxide
Date of Reg.
Date of Upd.
ID1239185
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About Caesium Oxide


Caesium oxide or cesium oxide describes inorganic compounds composed of caesium and oxygen. The following binary oxides of caesium are known: Cs₁₁O₃, Cs₄O, Cs₇O, and Cs₂O. Both the oxide and suboxides are brightly coloured. The species Cs₂O forms yellow-orange hexagonal crystals.

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