Zinc fluoride
| Zinc fluoride | |
|---|---|
 |
|
|
Other names
Zinc difluoride |
|
| Identifiers | |
| CAS number | 7783-49-5  , 13986-18-0 (tetrahydrate) |
| PubChem | 24551 |
| ChemSpider | 22957 |
| RTECS number | ZH3200000 |
| Jmol-3D images | Image 1 |
|
|
|
|
| Properties | |
| Molecular 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 (anhydrous) |
| Boiling point |
1500 °C (anhydrous) |
| Solubility in water | .000052 g/100 mL (anhydrous) 1.52 g/100 mL, 20 °C (tetrahydrate) |
| Solubility | sparingly soluble in HCl, HNO3, ammonia |
| Structure | |
| Crystal structure | tetragonal (anhydrous), tP6 |
| Space group | P42/mnm, No. 136 |
| Hazards | |
| EU Index | Not listed |
| NFPA 704 |
 0
2
1
|
 (verify) (what is:  / ?)Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) |
|
| 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). [1] It has a high melting point and has the rutile structure containing 6 coordinate zinc, which suggests appreciable ionic character in its chemical bonding.[2] Unlike the other zinc halides, ZnCl2, ZnBr2 and ZnI2, it is not very soluble in water.[2]
[edit] Preparation and reactions
Zinc fluoride can be synthesized several ways.
- Reaction of a fluoride salt with zinc chloride, to yield zinc fluoride and a chloride salt, in aqueous solution.[citation needed]
- The reaction of zinc metal with fluorine gas.[2]
- Reaction of hydrofluoric acid with zinc, to yield hydrogen gas (H2) and zinc fluoride (ZnF2).[2]
Zinc fluoride can be hydrolysed by hot water to form the zinc hydroxyfluoride, Zn(OH)F.[3]
[edit] References
- ^ Dale L. Perry, Sidney L. Phillips, 1995, Handbook of Inorganic Compounds, CRC Press, ISBN 0-8493-8671-3
- ^ a b c d Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Oxford: Butterworth-Heinemann. ISBN 0080379419.
- ^ Studies on metal hydroxy compounds. I. Thermal analyses of zinc derivatives ε-Zn(0H)2, Zn5(OH)8C12.H20, β- ZnOHC1, and ZnOHF, K SRIVASTAVA, EA SECCO - Canadian Journal of Chemistry, 1967 579-583
[edit] External links
|
|||||
 |
This inorganic compound-related article is a stub. You can help Wikipedia by expanding it. |
