Promethium(III) iodide
Chemical compound
From Wikipedia, the free encyclopedia
Promethium(III) iodide is an inorganic compound, with the chemical formula of PmI3. It is a red radioactive solid with a melting point of 695 °C.[1]
| Names | |
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| Other names
Promethium iodide Promethium triiodide | |
| Identifiers | |
3D model (JSmol) |
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PubChem CID |
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| Properties | |
| PmI3 | |
| Appearance | red solid[1] |
| Melting point | 695 °C[1] |
| Related compounds | |
Other anions |
promethium(III) fluoride promethium(III) chloride promethium(III) bromide |
Other cations |
neodymium(III) iodide samarium(III) iodide |
Related compounds |
promethium diiodide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Preparation
Promethium(III) iodide is obtained by reacting anhydrous hydrogen iodide and promethium(III) chloride at a high temperature:
- PmCl3 + 3 HI → PmI3 + 3 HCl[2]
From the reaction of a HI-H2 mixture and promethium oxide (Pm2O3), promethium(III) iodide cannot be produced, and only promethium oxyiodide (PmOI) can be obtained. Promethium oxide reacts with molten aluminum iodide at 500 °C to form promethium iodide.[3][4]
