Actinium(III) bromide is a radioactive white crystalline solid that is a salt of

actinium Actinium is a chemical element; it has chemical symbol, symbol Ac and atomic number 89. It was discovered by Friedrich Oskar Giesel in 1902, who gave it the name ''emanium''; the element got its name by being wrongly identified with a substa ...

. It is prepared by reacting

actinium(III) oxide 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 st ...

with

aluminium bromide Aluminium bromide is any chemical compound with the empirical formula AlBrx. Aluminium tribromide is the most common form of aluminium bromide. It is a colorless, sublimable hygroscopic solid; hence old samples tend to be hydrated, mostly as al ...

at 750 °C.

Reactions

When treated with a mixture of gaseous ammonia and water vapor at 500°C, it turns into actinium oxybromide.

References

{{inorganic-stub Actinium compounds Bromides Actinide halides