Caesium ozonide is an oxygen-rich chemical compound of caesium, with the chemical formula . It consists of caesium cations and ozonide anions . It can be formed by reacting ozone with caesium superoxide:[1] [2]
The compound reacts strongly with any water in the air forming caesium hydroxide.
If heated to between 70 and 100 °C, caesium ozonide will quickly decompose to caesium superoxide . In fact, the compound is metastable to decomposition into caesium superoxide, slowly decomposing at room temperature, but can remain intact for months if stored at −20 °C.[3]
Above around 8 °C, the crystal structure is of the caesium chloride type, with the ozonide ion in place of the chloride ion. At lower temperatures, the crystal structure changes to a structure identical to rubidium ozonide, with space group P21/c.