Protactinium(IV) bromide

Protactinium(IV) bromide
Names
	IUPAC name Protactinium(IV) tetrabromide
Identifiers
CAS Number	13867-42-0 ;
3D model (JSmol)	Interactive image;
	InChI InChI=1S/4BrH.Pa/h4*1H;/q;;;;+4/p-4 Key: HWPJRUOTLXLOJI-UHFFFAOYSA-J;
	SMILES [Pa](Br)(Br)(Br)Br;
Properties
Chemical formula	PaBr4
Molar mass	550.652
Appearance	red crystals
Structure
Crystal structure	tetragonal crystal system，tI20
Space group	I41/amd , No. 141
Related compounds
Other anions	Protactinium(IV) fluoride; Protactinium(IV) chloride; Protactinium(IV) iodide
Other cations	Uranium(IV) bromide; Thorium(IV) bromide; Praseodymium(III) bromide
Related compounds	Protactinium(V) bromide
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Protactinium(IV) bromide is an inorganic compound. It is an actinide halide, composed of protactinium and bromine. It is radioactive, and has the chemical formula of PaBr₄. It may be due to the brown color of bromine that causes the appearance of protactinium(IV) bromide to be brown crystals. Its crystal structure is tetragonal.^[1]^[2] Protactinium(IV) bromide is sublimed in a vacuum at 400 °C.^[1] The protactinium(IV) halide closest in structure to protactinium(IV) bromide is protactinium(IV) chloride.

^ ^a ^b ^c Tahri, Y; Chermette, H; Elkhatib, N; Krupa, J; Simoni, E (1990). "Electronic structures of thorium and protactinium halide clusters of [ThX8]4− type". Journal of the Less Common Metals. 158: 105–116. doi:10.1016/0022-5088(90)90436-N.
^ ^a ^b Brown, D.; Petcher, T. J.; Smith, A. J. (1968). "Crystal Structures of some Protactinium Bromides". Nature. 217 (5130): 737. Bibcode:1968Natur.217..737B. doi:10.1038/217737a0. S2CID 4264482.

[pabr4-1] Tahri, Y; Chermette, H; Elkhatib, N; Krupa, J; Simoni, E (1990). "Electronic structures of thorium and protactinium halide clusters of [ThX8]4− type". Journal of the Less Common Metals. 158: 105–116. doi:10.1016/0022-5088(90)90436-N.

[pabr5b-2] Brown, D.; Petcher, T. J.; Smith, A. J. (1968). "Crystal Structures of some Protactinium Bromides". Nature. 217 (5130): 737. Bibcode:1968Natur.217..737B. doi:10.1038/217737a0. S2CID 4264482.

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[2]