Promethium(III) hydroxide
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| CASNo = 13779-13-0
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| SMILES = [Pm+3].[OH-].[OH-].[OH-]
| StdInChI=1S/3H2O.Pm/h3*1H2;/q;;;+3/p-3
| StdInChIKey = HXMRPTXJQXYIQY-UHFFFAOYSA-K
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| Section2 = {{Chembox Properties
| Formula = Pm(OH)3
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| Appearance = purplish-pink solid
| Density = 5.1 g/cm3
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| Section3 = {{Chembox Structure
| CrystalStruct = hexagonal
| LattConst_a = 6.39 Å
| LattConst_c = 3.68 Å
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| OtherAnions = promethium oxide
| OtherCations = neodymium(III) hydroxide
samarium(III) hydroxide
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Promethium(III) hydroxide is an inorganic compound with a chemical formula Pm(OH)3. It is a radioactive 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:{{Cite journal|last1=Weigel|first1=Fritz|last2=Scherer|first2=Volker|date=1967|title=Die Chemie Des Promethiums. VI. Kristallines Promethium(III)-hydroxid|trans-title=Chemistry of promethium. VI. Crystalline promethium(III) hydroxide|journal=Radiochimica Acta|language=de|volume=7|issue=2–3|pages=72–74|doi=10.1524/ract.1967.7.23.72|s2cid=201841420}}
: Pm3+ + 3OH− → Pm(OH)3↓
References
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{{Promethium compounds}}
{{hydroxides}}