Actinium(III) oxide explained

Actinium(III) oxide should not be confused with Acetic anhydride.

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.^{[1] [2]} 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.

Reactions

• Ac₂O₃ + 6HF → 2AcF₃ + 3H₂O
• Ac₂O₃ + 6HCl → 2AcCl₃ + 3H₂O
• 4Ac(NO₃)₃ → 2Ac₂O₃ + 12NO₂ + 3O₂
• 4Ac + 3O₂ → 2Ac₂O₃
• Ac₂O₃ + 2AlBr₃ → 2AcBr₃ + Al₂O₃
• 2Ac(OH)₃ → Ac₂O₃ + 3H₂O
• Ac₂(C₂O₄)₃ → Ac₂O₃ + 3CO₂ + 3CO
• Ac₂O₃ + 3H₂S → Ac₂S₃ + 3H₂O

Notes and References

1. http://bse.sci-lib.com/article008169.html Actinium
2. The Preparation and Identification of Some Pure Actinium Compounds. Journal of the American Chemical Society. Sherman. Fried. 771–775. 10.1021/ja01158a034. 1950. 72. Hagemann. French. Zachariasen. W. H.. 2.