Americium (III) bromide

Crystal structure
	__ On 3+ __ Br -
Crystal system	orthorhombic
Space group	Cmcm (No. 63)
Lattice parameters	a = 406 pm ; b = 1266 pm ; c = 914 pm
General
Surname	Americium (III) bromide
other names	Americium tribromide
Ratio formula	AmBr 3
Brief description	white solid
External identifiers / databases
Wikidata	Q467634
properties
Molar mass	482.77 g mol −1
Physical state	firmly
density	6.79 g cm −3
Hazard and safety information
	; Radioactive
GHS hazard labeling ; no classification available
GHS hazard labeling ; no classification available
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Americium (III) bromide is a bromide of the artificial element and actinoid americium with the empirical formula AmBr ₃ . Americium occurs in this salt in the +3 oxidation state.

presentation

Americium (III) bromide can be obtained by reacting americium (III) chloride with ammonium bromide at 400–450 ° C under a hydrogen atmosphere.

{\ displaystyle {\ ce {AmCl3 + 3 NH4Br -> AmBr3 + 3 NH4Cl}}}

properties

Americium (III) bromide is a colorless ion compound consisting of Am ³⁺ and Br ^- ions. It crystallizes in the orthorhombic crystal system in the space group Cmcm (space group no. 63) with the lattice parameters a = 406 pm , b = 1266 and c = 914 pm and four formula units per unit cell . Its crystal structure is isotypic with plutonium (III) bromide . Template: room group / 63

safety instructions

Classifications according to the CLP regulation are not available because they only include chemical hazard and play a completely subordinate role compared to the hazards based on radioactivity . The latter also only applies if the amount of substance involved is relevant.

Individual evidence

↑ ^a ^b Gmelin's Handbook of Inorganic Chemistry , System No. 71, Transurane, Part C, p. 149.
↑ The hazards emanating from radioactivity do not belong to the properties to be classified according to the GHS labeling. With regard to other hazards, this substance has either not yet been classified or a reliable and citable source has not yet been found.
↑ ^a ^b L. B. Asprey, TK Keenan, FH Kruse: Crystal Structures of the Trifluorides, Trichlorides, Tribromides, and Triiodides of Americium and Curium , in: Inorg. Chem. , 1965 , 4 (7), pp. 985-986 ( doi : 10.1021 / ic50029a013 ).

literature

Wolfgang H. Runde, Wallace W. Schulz: Americium , in: Lester R. Morss, Norman M. Edelstein, Jean Fuger (Eds.): The Chemistry of the Actinide and Transactinide Elements , Springer, Dordrecht 2006; ISBN 1-4020-3555-1 , pp. 1265-1395 ( doi : 10.1007 / 1-4020-3598-5_8 ).

[Gmelin-1] Gmelin's Handbook of Inorganic Chemistry , System No. 71, Transurane, Part C, p. 149.

[NV-2] The hazards emanating from radioactivity do not belong to the properties to be classified according to the GHS labeling. With regard to other hazards, this substance has either not yet been classified or a reliable and citable source has not yet been found.

[asprey-3] L. B. Asprey, TK Keenan, FH Kruse: Crystal Structures of the Trifluorides, Trichlorides, Tribromides, and Triiodides of Americium and Curium , in: Inorg. Chem. , 1965 , 4 (7), pp. 985-986 ( doi : 10.1021 / ic50029a013 ).