Rubidium sesquioxide

Rubidium sesquioxide is a chemical compound with the formulaRb₂O₃ or more accurately Rb₄O₆. In terms of oxidation states, rubidium in this compound has a nominal charge of +1, and the oxygen is a mixed peroxide (O2−2) and superoxide (O−2) for a structural formula of (Rb)₄(O−2)₂(O2−2). It has been studied theoretically as an example of a strongly correlated material.