Promethium(III) bromide
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| Name = Promethium(III) bromide
| ImageFile = Unit_cell_of_PuBr3.png
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| IUPACName = Promethium(III) bromide
| Section1 = {{Chembox Identifiers
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| ChemSpiderID = 75391
| EINECS = 236-893-0
| PubChem = 129681503
| StdInChI=1S/3BrH.Pm/h3*1H;/q;;;+3/p-3
| StdInChIKey=GWRKFHUNEGTAQB-UHFFFAOYSA-K
| SMILES = [Pm+3].[Br-].[Br-].[Br-]
| CASNo = 14325-78-1
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| Section2 = {{Chembox Properties
| Formula = PmBr3
| MolarMass = 385
| Appearance = Red solid{{cite book|author=Cotton, Simon|title=Lanthanide And Actinide Chemistry|url=https://books.google.com/books?id=SvAbtU6XvzgC&pg=PA117|year= 2006|publisher=John Wiley & Sons|isbn=978-0-470-01006-8|page=117}}
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| Section8 = {{Chembox Related
| OtherAnions = Promethium(III) fluoride
Promethium(III) chloride
Promethium(III) iodide
| OtherCations = Neodymium(III) bromide
Samarium(III) bromide
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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).
Preparation
Promethium(III) bromide can be obtained by reacting hydrogen bromide and promethium(III) oxide:W. R. Wilmarth, G. M. Begun, R. G. Haire, et al. Raman spectra of Pm2O3, PmF3, PmCl3, PmBr3 and PmI3. Journal of Raman Spectroscopy, 2005. 19(4)
: 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:{{cite journal |last1=Wishnevsky |first1=V |last2=Theissig |first2=W |last3=Weigel |first3=F |title=The vapor phase hydrolysis of lanthanide(III) bromides IV: Heat and free energy of the reaction PmBr3(s) + H2O(g) = PmOBr(s) + 2HBr(g) |journal=Journal of the Less Common Metals |date=June 1984 |volume=99 |issue=2 |pages=321–329 |doi=10.1016/0022-5088(84)90230-3}}
: PmBr3 + H2O(g) → PmOBr + 2 HBr
References
{{reflist}}
{{Promethium compounds}}
{{Bromides}}
{{Lanthanide halides}}