Manganese(II) iodide

Manganese(II) iodide
Names
	IUPAC name Manganese(II) iodide
Identifiers
CAS Number	7790-33-2 ; 7790-33-2 tetrahydrate;
3D model (JSmol)	Interactive image;
ChemSpider	74227 ;
ECHA InfoCard	100.029.274
EC Number	232-201-6;
PubChem CID	82250;
UNII	5Q9VVO3QCN ;
CompTox Dashboard (EPA)	DTXSID20999088 ;
	InChI InChI=1S/2HI.Mn/h21H;/q;;+2/p-2 Key: QWYFOIJABGVEFP-UHFFFAOYSA-L ; InChI=1/2HI.Mn/h21H;/q;;+2/p-2 Key: QWYFOIJABGVEFP-NUQVWONBAL;
	SMILES [Mn+2].[I-].[I-];
Properties
Chemical formula	MnI2
Molar mass	308.747 g/mol
Appearance	pink crystalline
Density	5.01 g/cm3
Melting point	701 °C (1,294 °F; 974 K) (anhydrous) ; 80 °C (tetrahydrate)
Boiling point	1,033 °C (1,891 °F; 1,306 K)
Solubility in water	soluble
Magnetic susceptibility (χ)	+14,400·10−6 cm3/mol
Structure
Crystal structure	Rhombohedral, hP3, SpaceGroup = P-3m1, No. 164
Coordination geometry	octahedral
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H360
Precautionary statements	P201, P202, P281, P308+P313, P405, P501
NFPA 704 (fire diamond)	1 0 1
Flash point	non-flammable
Related compounds
Other anions	Manganese(II) fluoride; Manganese(II) chloride; Manganese(II) bromide
Other cations	Iron(II) iodide; Cobalt(II) iodide
	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

Manganese(II) iodide is the chemical compound composed of manganese and iodide with the formula MnI₂(H2O)_n. The tetrahydrate is a pink solid while the anhydrous derivative is beige. Both forms feature octahedral Mn centers. Unlike MnCl₂(H₂O)₄ and MnBr₂(H₂O)₄ which are cis, MnI₂(H₂O)₄ is trans.