Chemistry:Curium(III) bromide
From HandWiki
Short description: Inorganic chemical compound
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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). | |
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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]
- CmCl
3 + 3NH
4Br → CmBr
3 + 3 NH
4Cl
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
- ↑ 1.0 1.1 "Curium tribromide". PubChem. 9 October 2021. https://pubchem.ncbi.nlm.nih.gov/compound/185560.
- ↑ Ltd, Mark Winter, University of Sheffield and WebElements. "Curium Tribromide". https://www.webelements.com/compounds/curium/curium_tribromide.html.
- ↑ Gmelins Handbuch der anorganischen Chemie, System Nr. 71, Transurane, Teil C, S. 149.
- ↑ 4.0 4.1 Katz, J.; Seaborg, Glenn. The Chemistry of the Actinide and Transactinide Elements (3rd ed., Volumes 1-5). p. 1417.
- ↑ 5.0 5.1 Asprey, L. B.; Keenan, T. K.; Kruse, F. H. (Jul 1965). "Crystal Structures of the Trifluorides, Trichlorides, Tribromides, and Triiodides of Americium and Curium" (in en). Inorganic Chemistry 4 (7): 985–986. doi:10.1021/ic50029a013. ISSN 0020-1669. https://pubs.acs.org/doi/abs/10.1021/ic50029a013.
- ↑ Burns, John H.; Peterson, J.R.; Stevenson, J.N. (Mar 1975). "Crystallographic studies of some transuranic trihalides: 239PuCl3, 244CmBr3, 249BkBr3 and 249CfBr3" (in en). Journal of Inorganic and Nuclear Chemistry 37 (3): 743–749. doi:10.1016/0022-1902(75)80532-X. https://linkinghub.elsevier.com/retrieve/pii/002219027580532X.
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