Promethium(III) bromide

Promethium(III) bromide
Names
IUPAC name
Promethium(III) bromide
Identifiers
3D model (JSmol)
ChemSpider
EC Number
  • 236-893-0
  • InChI=1S/3BrH.Pm/h3*1H;/q;;;+3/p-3
    Key: GWRKFHUNEGTAQB-UHFFFAOYSA-K
  • [Pm+3].[Br-].[Br-].[Br-]
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).

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:[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

References

  1. ^ a b Cotton, Simon (2006). Lanthanide And Actinide Chemistry. John Wiley & Sons. p. 117. ISBN 978-0-470-01006-8.
  2. ^ 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)
  3. ^ Wishnevsky, V; Theissig, W; Weigel, F (June 1984). "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 of the Less Common Metals. 99 (2): 321–329. doi:10.1016/0022-5088(84)90230-3.