Curium(III) hydroxide

Curium hydroxide Cm(OH)3 is a radioactive compound first discovered in measurable quantities in 1947. It is composed of a single curium atom and three hydroxy groups. It was the first curium compound ever isolated.

Curium hydroxide is an anhydrous colorless or light-yellow amorphous gelatinous solid that is insoluble in water.

Due to self-irradiation, the crystal structure of ^{244}Cm(OH)3 decomposes within one day (^{244}Cm has a half-life of 18.11 years); for ^{241}Am(OH)3 the same process takes 4 to 6 months (^{241}Am has a half-life of 432.2 years).