Cadmium fluoride | |
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Cadmium fluoride |
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Other names
Cadmium(II) fluoride, Cadmium difluoride |
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Identifiers | |
CAS number | 7790-79-6 |
ChemSpider | 23036 |
EC number | 232-222-0 |
Jmol-3D images | Image 1 |
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Properties | |
Molecular formula | CdF2 |
Molar mass | 150.41 g/mol |
Appearance | grey or white-grey crystals |
Density | 6.33 g/cm3, solid |
Melting point |
1110 °C |
Boiling point |
1748 °C |
Solubility in water | 4.35 g/100 mL |
Solubility | soluble in acid insoluble in ethanol alcohol and liquid ammonia |
Structure | |
Crystal structure | Fluorite (cubic), cF12 |
Space group | Fm3m, No. 225 |
Hazards | |
EU Index | 048-006-00-2 |
EU classification | Carc. Cat. 2 Muta. Cat. 2 Repr. Cat. 2 Highly toxic (T+) Dangerous for the environment (N) |
R-phrases | R45, R46, R60, R61, R25, R26, R48/23/25, R50/53 |
S-phrases | S53, S45, S60, S61 |
Related compounds | |
Other anions | Cadmium chloride, Cadmium bromide Cadmium iodide |
Other cations | Zinc fluoride, Calcium fluoride, Magnesium fluoride |
(verify) (what is: / ?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) |
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Infobox references |
Cadmium fluoride (CdF2) is a mostly water-insoluble source of cadmium used in oxygen-sensitive applications, such as the production of metallic alloys. In extremely low concentrations (ppm), this and other fluoride compounds are used in limited medical treatment protocols. Fluoride compounds also have significant uses in synthetic organic chemistry.[1]
Contents |
Cadmium fluoride is prepared by the reaction of gaseous fluorine or hydrogen fluoride with cadmium metal or its salts, such as the chloride, oxide, or sulfate.
It may also be obtained by dissolving cadmium carbonate in 40% hydrofluoric acid solution, evaporating the solution and drying in a vacuum at 150 °C.
Another method of preparing it is to mix cadmium chloride and ammonium fluoride solutions, followed by crystallization. The insoluble cadmium fluoride is filtered from solution.[2]
Cadmium fluoride, like all cadmium compounds, is toxic and should be used with care. Fluoride is mildly toxic by comparison.
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