Promethium(III) iodide
Promethium iodide is an inorganic compound, with the chemical formula of PmI3. It is a red radioactive solid with a melting point of 695 °C.
Preparation
Promethium iodide is obtained by reacting anhydrous hydrogen iodide and promethium(III) chloride at a high temperature:From the reaction of a HI-H2 mixture and promethium oxide, promethium iodide cannot be produced, and only promethium oxyiodide can be obtained. Promethium oxide reacts with molten aluminum iodide at 500 °C to form promethium iodide.