Curium(III) bromide

Curium(III) bromide[1]
Names
Other names
  • Curium tribromide
  • Curium bromide
Identifiers
3D model (JSmol)
ChemSpider
  • InChI=1S/3BrH.Cm/h3*1H;/p-3
    Key: HKCWOGXVUZTSCB-UHFFFAOYSA-K
  • [Br-].[Br-].[Br-].[Cm]
Properties
CmBr3
Molar mass 486.782 g/mol
Appearance White or pale yellow green solid[2]
Density 6.87 g·cm−3[3]
Boiling point 625 °C (1,157 °F; 898 K)
Structure[4]
Orthorhombic
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Curium(III) bromide is the bromide salt of curium.[1] It has an orthorhombic crystal structure.[4]

Preparation

Curium bromide can be produced by reacting curium chloride and ammonium bromide in a hydrogen atmosphere at 400–450 °C.[5]

CmCl3 + 3NH4Br → CmBr3 + 3 NH4Cl

It can also be produced by reacting curium(III) oxide and hydrobromic acid at 600 °C.[6]

Properties

Curium bromide is an ionic compound composed of Cm3+ and Br−, appearing as a colorless solid. It is orthorhombic, with space group Cmcm (No. 63) and lattice parameters a = 405 pm, b = 1266 pm and c = 912 pm.[5] Its crystal structure is isostructural with plutonium(III) bromide.

References

  1. ^ a b "Curium tribromide". PubChem. 9 October 2021. Retrieved 13 October 2021.
  2. ^ Ltd, Mark Winter, University of Sheffield and WebElements. "Curium Tribromide". www.webelements.com. Retrieved 13 October 2021.{cite web}: CS1 maint: multiple names: authors list (link)
  3. ^ Gmelins Handbuch der anorganischen Chemie, System Nr. 71, Transurane, Teil C, S. 149.
  4. ^ a b Katz, J.; Seaborg, Glenn. Morss, L; Edelstein, Norman; Fuger, Jean (eds.). The Chemistry of the Actinide and Transactinide Elements (3rd ed., Volumes 1-5). p. 1417.
  5. ^ a b Asprey, L. B.; Keenan, T. K.; Kruse, F. H. (Jul 1965). "Crystal Structures of the Trifluorides, Trichlorides, Tribromides, and Triiodides of Americium and Curium". Inorganic Chemistry. 4 (7): 985–986. doi:10.1021/ic50029a013. ISSN 0020-1669.
  6. ^ Burns, John H.; Peterson, J.R.; Stevenson, J.N. (Mar 1975). "Crystallographic studies of some transuranic trihalides: 239PuCl3, 244CmBr3, 249BkBr3 and 249CfBr3". Journal of Inorganic and Nuclear Chemistry. 37 (3): 743–749. doi:10.1016/0022-1902(75)80532-X.