Zinc fluoride

Zinc fluoride
Names
	IUPAC name Zinc(II) fluoride
	Other names Zinc difluoride
Identifiers
CAS Number	7783-49-5 ; 13986-18-0 (tetrahydrate) ;
3D model (JSmol)	Interactive image;
ChemSpider	22957 ;
ECHA InfoCard	100.029.092
EC Number	232-001-9;
PubChem CID	24551;
RTECS number	ZH3200000;
UNII	L9V334775I ; SQ7815WXFB (tetrahydrate) ;
UN number	3077
CompTox Dashboard (EPA)	DTXSID20894882 ;
	InChI InChI=1S/2FH.Zn/h2*1H;/q;;+2/p-2 Key: BHHYHSUAOQUXJK-UHFFFAOYSA-L ;
	SMILES F[Zn]F;
Properties
Chemical formula	ZnF2
Molar mass	103.406 g/mol (anhydrous) ; 175.45 g/mol (tetrahydrate)
Appearance	white needles ; hygroscopic
Density	4.95 g/cm3 (anhydrous); 2.30 g/cm3 (tetrahydrate)
Melting point	872 °C (1,602 °F; 1,145 K) (anhydrous); 100 °C, decomposes (tetrahydrate)
Boiling point	1,500 °C (2,730 °F; 1,770 K) (anhydrous)
Solubility in water	.000052 g/(100 mL) (anhydrous); 1.52 g/(100 mL), 20 °C (tetrahydrate)
Solubility	sparingly soluble in HCl, HNO3, ammonia
Magnetic susceptibility (χ)	−38.2·10−6 cm3/mol
Structure
Crystal structure	tetragonal (anhydrous), tP6
Space group	P42/mnm, No. 136
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H301, H315, H318, H335
Precautionary statements	P261, P264, P270, P271, P280, P301+P310, P302+P352, P304+P340, P305+P351+P338, P310, P312, P330, P332+P313, P337+P313, P362, P403+P233, P405, P501
NFPA 704 (fire diamond)	3 0 0
Related compounds
Other anions	Zinc(II) bromide; Zinc(II) chloride; Zinc(II) iodide;
Other cations	Cadmium(II) fluoride; Mercury(II) fluoride;
	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

Zinc fluoride is an inorganic chemical compound with the chemical formula Zn F₂. It is encountered as the anhydrous form and also as the tetrahydrate, ZnF₂·4H₂O (rhombohedral crystal structure). It has a high melting point and has the rutile structure containing 6 coordinate zinc, which suggests appreciable ionic character in its chemical bonding. Unlike the other zinc halides, ZnCl₂, ZnBr₂ and ZnI₂, it is not very soluble in water.

Like some other metal difluorides, ZnF₂ crystallizes in the rutile structure, which features octahedral Zn cations and trigonal planar fluorides.

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