Promethium(III) hydroxide is an inorganic compound with a chemical formula Pm(OH)₃. It is a

radioactive Radioactive decay (also known as nuclear decay, radioactivity, radioactive disintegration, or nuclear disintegration) is the process by which an unstable atomic nucleus loses energy by radiation. A material containing unstable nuclei is conside ...

compound.

Production

Promethium(III) hydroxide can be produced by reacting ammonia water with a solution of a promethium(III) salt, from which promethium(III) hydroxide precipitates as a purplish-pink amorphous solid. By heating with water, it can be forced to crystallize, giving hexagonal crystals isomorphous with other rare earth hydroxides: : Pm³⁺ + 3OH⁻ → Pm(OH)₃↓

References

{{hydroxides Promethium compounds Hydroxides