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| Names | |
|---|---|
| IUPAC name Zinc(II) fluoride | |
| Other names Zinc difluoride | |
| Identifiers | |
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3D model (JSmol) | |
| ChemSpider |
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| ECHA InfoCard | 100.029.092 |
| EC Number |
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| RTECS number |
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| UNII |
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| UN number | 3077 |
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| 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 inHCl,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 | |
Otheranions | |
Othercations | |
Except where otherwise noted, data are given for materials in theirstandard state (at 25 °C [77 °F], 100 kPa). | |
Zinc fluoride is aninorganicchemical compound with thechemical formulaZnF2. It is encountered as theanhydrous form and also as thetetrahydrate,ZnF2·4H2O (rhombohedral crystal structure).[2] It has a highmelting point and has therutile structure containing6 coordinate zinc, which suggests appreciableionic character in its chemical bonding.[3] Unlike the other zinc halides,ZnCl2,ZnBr2 andZnI2, it is not very soluble in water.[3]
Like some other metal difluorides,ZnF2 crystallizes in therutile structure, which featuresoctahedral Zncations andtrigonal planarfluorides.[4]
Zinc fluoride can be synthesized several ways.
Zinc fluoride can be hydrolysed by hot water to form the zinc hydroxide fluoride, Zn(OH)F.[5]
The salt is believed to form both a tetrahydrate and a dihydrate.[6]
