Promethium(III) hydroxide
Promethium(III) hydroxide is an inorganic compound with a chemical formula Pm(OH)3. It is a radioactive compound.
| Identifiers | |
|---|---|
3D model (JSmol) |
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| Properties | |
| Pm(OH)3 | |
| Appearance | purplish-pink solid |
| Density | 5.1 g/cm3 |
| Structure | |
| hexagonal | |
a = 6.39 Å, c = 3.68 Å | |
| Related compounds | |
Other anions |
promethium oxide |
Other cations |
neodymium(III) hydroxide samarium(III) hydroxide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
| Infobox references | |
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:[1]
- Pm3+ + 3OH− → Pm(OH)3↓
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References
- Weigel, Fritz; Scherer, Volker (1967). "Die Chemie Des Promethiums. VI. Kristallines Promethium(III)-hydroxid" [Chemistry of promethium. VI. Crystalline promethium(III) hydroxide]. Radiochimica Acta (in German). 7 (2–3): 72–74. doi:10.1524/ract.1967.7.23.72.
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