Plutonium (III) bromide

Crystal structure
	__ Pu 3+ __ Br -
Crystal system	orthorhombic
Space group	Ccmm (No. 63, position 2)
Lattice parameters	a = 1262 pm ; b = 409 pm ; c = 910 pm
General
Surname	Plutonium (III) bromide
other names	Plutonium tribromide
Ratio formula	PuBr 3
Brief description	green solid
External identifiers / databases
Wikidata	Q2099796
properties
Molar mass	483.78 g mol −1
Physical state	firmly
density	6.69 g cm −3
Melting point	681 ° C
boiling point	1463 ° C
solubility	easily soluble in water
Hazard and safety information
	; Radioactive
GHS hazard labeling ; no classification available
GHS hazard labeling ; no classification available
Thermodynamic properties
ΔH f 0	−187.7 ± 1.0 kcal mol −1
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Plutonium (III) bromide is a chemical compound consisting of the elements plutonium and bromine . It has the formula pUBR ₃ and belongs to the class of the bromides .

presentation

Plutonium (III) bromide can be produced by reacting plutonium (IV) oxide hydrate with hydrogen bromide .

{\ displaystyle {\ ce {2 PuO2. x H2O + 8 HBr -> 2 PuBr3 + (4 + 2 x) H2O + Br2}}}

It is also possible to display it by reacting plutonium (III) oxalate decahydrate with hydrogen bromide.

{\ displaystyle {\ ce {Pu2 (C2O4) 3. 10 H2O + 6 HBr -> 2 PuBr3 + 3 CO + 3 CO2 + 13 H2O}}}

properties

Plutonium (III) bromide forms very hygroscopic blue-green to emerald-green crystals with a melting point of 681 ° C. When melted, it is green at 683 ° C and amber yellow at 850 ° C. It crystallizes in the orthorhombic crystal system in the space group Ccmm (space group no. 63, position 2) with the lattice parameters a = 1262 pm , b = 409 pm and c = 910 pm and four formula units per unit cell . In the crystal, each plutonium ion is coordinated by eight bromide ions, the coordination polyhedron is a double-capped trigonal prism . Template: room group / 63.2

safety instructions

Classifications according to the CLP regulation are not available, although the chemical toxicity is known. The dangers based on radioactivity are important , provided that the amount of substance involved is relevant.

Individual evidence

^ ^A ^b W. H. Zachariasen: "Crystal Chemical Studies of the 5f-Series of Elements. I. New Structure Types ", in: Acta Crystallographica , 1948 , 1 , pp. 265-268 ( doi : 10.1107 / S0365110X48000703 ).
↑ ^a ^b ^c ^d ^e Gmelin's Handbook of Inorganic Chemistry , System No. 71, Transurane, Part C, pp. 148-150.
↑ ^a ^b ^c ^d Georg Brauer (Ed.), With the collaboration of Marianne Baudler a . a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume II, Ferdinand Enke, Stuttgart 1978, ISBN 3-432-87813-3 , p. 1303.
↑ 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.

literature

David L. Clark, Siegfried S. Hecker , Gordon D. Jarvinen, Mary P. Neu: Plutonium , 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. 813-1264 ( doi : 10.1007 / 1-4020-3598-5_7 ).

[Zachariasen-1] A ^b W. H. Zachariasen: "Crystal Chemical Studies of the 5f-Series of Elements. I. New Structure Types ", in: Acta Crystallographica , 1948 , 1 , pp. 265-268 ( doi : 10.1107 / S0365110X48000703 ).

[Gmelin-2] Gmelin's Handbook of Inorganic Chemistry , System No. 71, Transurane, Part C, pp. 148-150.

[brauer-3] Georg Brauer (Ed.), With the collaboration of Marianne Baudler a . a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume II, Ferdinand Enke, Stuttgart 1978, ISBN 3-432-87813-3 , p. 1303.

[NV-4] 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.