Zinc fluoride

Zinc fluoride

Names
Other names Zinc difluoride
Identifiers
CAS Number	7783-49-5 Y 13986-18-0 (tetrahydrate) N
3D model (JSmol)	Interactive image
ChemSpider	22957 Y
ECHA InfoCard	100.029.092
PubChem CID	24551
RTECS number	ZH3200000
InChI InChI=1S/2FH.Zn/h2*1H;/q;;+2/p-2 Y Key: BHHYHSUAOQUXJK-UHFFFAOYSA-L Y InChI=1/2FH.Zn/h2*1H;/q;;+2/p-2 Key: BHHYHSUAOQUXJK-NUQVWONBAR
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
NFPA 704	0 2 1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N  (what is YN ?)
Infobox references

Zinc fluoride (ZnF₂) is an inorganic chemical compound. It is encountered as the anydrous 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.

Zinc fluoride can be synthesized several ways.

Zinc fluoride can be hydrolysed by hot water to form the zinc hydroxyfluoride, Zn(OH)F.