Actinium(III) oxide

Rarity: Uncommon

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Notion

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Science and technology

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What Wikipedia says

Actinium(III) oxide is a chemical compound containing the rare radioactive element actinium. It has the molecular formula Ac2O3. It is similar to its corresponding lanthanum compound, lanthanum(III) oxide, and contains actinium in the oxidation state +3.

Excerpt from the Wikipedia article “Actinium(III) oxide”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Д.Ильин: vectorization, CC0, via Wikimedia Commons.