Nickel(II) bromide

Nickel(II) bromide
	Anhydrous
	Hexahydrate
Names
	IUPAC name Nickel(II) bromide
	Other names Nickel dibromide,; Nickel bromide,; Nickelous bromide
Identifiers
CAS Number	13462-88-9 Anhydrous ; 13596-19-5 dihydrate ; 7789-49-3 trihydrate ; 18721-96-5 hexahydrate ;
3D model (JSmol)	Interactive image;
ChemSpider	24251 ;
ECHA InfoCard	100.033.318
PubChem CID	278492;
UNII	41SGH8A2S6 ;
CompTox Dashboard (EPA)	DTXSID40928693 ;
	InChI InChI=1S/2BrH.Ni/h2*1H;/q;;+2/p-2 Key: IPLJNQFXJUCRNH-UHFFFAOYSA-L ;
	SMILES [Ni+2].[Br-].[Br-];
Properties
Chemical formula	NiBr2
Molar mass	218.53 g/mol
Appearance	yellow-brown crystals
Odor	odorless
Density	5.10 g/cm3
Melting point	963 °C (1,765 °F; 1,236 K) sublimes
Solubility in water	1.13 kg/L (0 °C) ; 1.22 kg/L (10 °C) ; 1.31 kg/L (20 °C); 1.44 kg/L (40 °C) ; 1.55 kg/L (100 °C)
Band gap	2.5 eV
Magnetic susceptibility (χ)	+5600.0·10−6 cm3/mol
Structure
Crystal structure	hexagonal, hR9
Space group	R3m, No. 166
Lattice constant	a = 0.36998 nm, c = 1.82796 nm
Formula units (Z)	3
Thermochemistry
Std enthalpy of; formation (ΔfH⦵298)	−212.1 kJ·mol−1
Hazards
	Occupational safety and health (OHS/OSH):
Main hazards	Irritant, corrosive
NFPA 704 (fire diamond)	1 0 0
Flash point	Non-flammable
Related compounds
Other anions	nickel(II) fluoride; nickel(II) chloride; nickel(II) iodide
Other cations	cobalt(II) bromide; copper(II) bromide; palladium(II) bromide
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Nickel(II) bromide is the name for the inorganic compounds with the chemical formula NiBr₂(H₂O)_x. The value of x can be 0 for the anhydrous material, as well as 2, 3, or 6 for the three known hydrate forms. The anhydrous material is a yellow-brown solid which dissolves in water to give blue-green hexahydrate (see picture).