Curium(III) bromide
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| 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) |
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| 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
[edit]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
[edit]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
[edit]- ^ a b "Curium tribromide". PubChem. 9 October 2021. Retrieved 13 October 2021.
- ^ 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) - ^ Gmelins Handbuch der anorganischen Chemie, System Nr. 71, Transurane, Teil C, S. 149.
- ^ 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.
- ^ 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.
- ^ 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.