Actinium(III) oxide is a chemical compound containing the rare radioactive element actinium.

It is similar to its corresponding lanthanum compound, lanthanum(III) oxide, and contains actinium in the oxidation state +3.

[2][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.

This inorganic compound–related article is a stub.

You can help Wikipedia by expanding it.