Actinium(III) sulfide is the radioactive compound of

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

with the formula Ac₂S₃. This salt was prepared by heating actinium(III) oxalate at 1400°C for 6 minutes in a mixture of

carbon disulfide Carbon disulfide (also spelled as carbon disulphide) is a neurotoxic, colorless, volatile liquid with the formula and structure . The compound is used frequently as a building block in organic chemistry as well as an industrial and chemical non ...

and

hydrogen sulfide Hydrogen sulfide is a chemical compound with the formula . It is a colorless chalcogen-hydride gas, and is poisonous, corrosive, and flammable, with trace amounts in ambient atmosphere having a characteristic foul odor of rotten eggs. The unde ...

. The result was conformed to be actinium(III) sulfide by x-ray diffraction.

References

{{inorganic-stub Actinium compounds Sesquisulfides