Zinc fluoride
Chemical compound / From Wikipedia, the free encyclopedia
Zinc fluoride is an inorganic chemical compound with the chemical formula ZnF2. It is encountered as the anhydrous form and also as the tetrahydrate, ZnF2·4H2O (rhombohedral crystal structure).[2] It has a high melting point and has the rutile structure containing 6 coordinate zinc, which suggests appreciable ionic character in its chemical bonding.[3] Unlike the other zinc halides, ZnCl2, ZnBr2 and ZnI2, it is not very soluble in water.[3]
Quick Facts Names, Identifiers ...
Names | |
---|---|
IUPAC name
Zinc(II) fluoride | |
Other names
Zinc difluoride | |
Identifiers | |
| |
3D model (JSmol) |
|
ChemSpider |
|
ECHA InfoCard | 100.029.092 |
EC Number |
|
PubChem CID |
|
RTECS number |
|
UNII |
|
UN number | 3077 |
CompTox Dashboard (EPA) |
|
| |
| |
Properties | |
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) |
.000052 g/(100 mL) (anhydrous) 1.52 g/(100 mL), 20 °C (tetrahydrate) | |
Solubility | sparingly soluble in HCl, HNO3, ammonia |
−38.2·10−6 cm3/mol | |
Structure | |
tetragonal (anhydrous), tP6 | |
P42/mnm, No. 136 | |
Hazards | |
GHS labelling:[1] | |
Danger | |
H301, H315, H318, H335 | |
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) | |
Related compounds | |
Other anions |
|
Other cations |
|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
|
Close
Like some other metal difluorides, ZnF2 crystallizes in the rutile structure, which features octahedral Zn cations and trigonal planar fluorides.[4]