Promethium(III) bromide
Chemical compound
From Wikipedia, the free encyclopedia
Promethium(III) bromide is an inorganic compound, with the chemical formula of PmBr3. It is radioactive salt. It is a crystal of the hexagonal crystal system, with the space group of P63/mc (No. 176).
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| Names | |
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| IUPAC name
Promethium(III) bromide | |
| Identifiers | |
3D model (JSmol) |
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| ChemSpider | |
PubChem CID |
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| Properties | |
| PmBr3 | |
| Molar mass | 385 |
| Appearance | Red solid[1] |
| Melting point | 624[1] |
| Related compounds | |
Other anions |
Promethium(III) fluoride Promethium(III) chloride Promethium(III) iodide |
Other cations |
Neodymium(III) bromide Samarium(III) bromide |
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) bromide can be obtained by reacting hydrogen bromide and promethium(III) oxide:[2]
- Pm2O3 + 6 HBr —500°C→ 2 PmBr3 + 3 H2O
Promethium(III) bromide hydrate cannot be heated to form its anhydrous form. Instead it decomposes in water to form promethium oxybromide:[3]
- PmBr3 + H2O(g) → PmOBr + 2 HBr