Neptunium(III) bromide

Neptunium(III) bromide
Identifiers
CAS Number	20730-39-6;
3D model (JSmol)	Interactive image;
	InChI InChI=1S/3BrH.Np/h3*1H;/q;;;+3/p-3 Key: HVGILCLFCSGPEI-UHFFFAOYSA-K;
	SMILES [Np+3].[Br-].[Br-].[Br-];
Properties
Chemical formula	Br3Np
Molar mass	477 g·mol−1
Appearance	green solid
Density	6.62 g·cm−3
Structure
Crystal structure	α-NpBr3: hexagonal; β-NpBr3: orthorhombic
Space group	α-NpBr3: P63/m (No. 176); β-NpBr3: Ccmm (No. 63)
Lattice constant	a = 791.7 pm (α), 411 pm (β), b = 791.7 pm (α), 1265 pm (β), c = 438.2 pm (α), 915 pm (β)
Related compounds
Other anions	neptunium(III) fluoride; neptunium(III) chloride; neptunium(III) iodide
Other cations	uranium(III) bromide; plutonium(III) bromide
Related compounds	neptunium(IV) bromide
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Neptunium(III) bromide is a bromide of neptunium, with the chemical formula of NpBr₃.