Lithium ozonide (LiO3) is a red solid which is produced from caesium ozonide via an ion-exchange process.
Sodium ozonide (NaO3) is a red solid which is produced from caesium ozonide via an ion-exchange process.[1]
Potassium ozonide (KO3) is a dark red solid which is produced when potassium is burned in ozone or exposed to air for years.
Rubidium ozonide (RbO3) is a dark red solid which is produced when rubidium is burned in ozone.
Caesium ozonide (CsO3) is a dark red solid which is produced when caesium is burned in ozone.[2]
References
^Klein, W.; Armbruster, K.; Jansen, M. (1998). "Synthesis and crystal structure determination of sodium ozonide". Chemical Communications (6): 707–708. doi:10.1039/a708570b.
^F. A. Cotton and G. Wilkinson "Advanced Inorganic Chemistry", 5th edition (1988), p.462