Tags: Chemical Compound, Chemical Substance.
Actinium(III) oxide is a chemical compound containing the rare radioactive element actinium. It has the formula Ac2O3. It is similar to its corresponding lanthanum compound lanthanum(III) oxide and contains actinium in the oxidation state +3. Actinium oxide is not to be confused with Ac2O (acetic anhydride) where Ac is an abbreviation for acetyl instead of the symbol of the element actinium.
