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 | |
| Names | |
|---|---|
| Other names Lead difluoride plumbous fluoride | |
| Identifiers | |
3D model (JSmol) | |
| ChemSpider | |
| ECHA InfoCard | 100.029.089 |
| UNII | |
| |
| |
| Properties | |
| PbF2 | |
| Molar mass | 245.20 g/mol |
| Appearance | white powder |
| Odor | odorless |
| Density | 8.445 g/cm3 (orthorhombic) 7.750 g/cm3 (cubic) |
| Melting point | 824 °C (1,515 °F; 1,097 K) |
| Boiling point | 1,293 °C (2,359 °F; 1,566 K) |
| 0.057 g/100 mL (0 °C) 0.0671 g/100 mL (20 °C)[1] | |
Solubility product (Ksp) | 2.05·10−8 (20 °C) |
| Solubility | soluble innitric acid andhydrochloric acid; insoluble inacetone andammonia |
| −58.1·10−6 cm3/mol | |
| Structure | |
| Fluorite (cubic),cF12 | |
| Fm3m, No. 225 | |
| Hazards | |
| Lethal dose or concentration (LD, LC): | |
LD50 (median dose) | 3031 mg/kg (oral, rat) |
| Related compounds | |
Otheranions | Lead(II) chloride Lead(II) bromide Lead(II) iodide |
Othercations | Difluorocarbene Difluorosilylene Difluorogermylene Stannous fluoride |
Except where otherwise noted, data are given for materials in theirstandard state (at 25 °C [77 °F], 100 kPa). | |
Lead(II) fluoride is theinorganic compound with the formulaPbF2. It is a white solid. The compound ispolymorphic, at ambient temperatures it exists inorthorhombic (PbCl2 type) form, while at high temperatures it iscubic (Fluorite type).[2]
Lead(II) fluoride can be prepared by treatinglead(II) hydroxide orlead(II) carbonate withhydrofluoric acid:[3]
Alternatively, it is precipitated by adding hydrofluoric acid to a lead(II) salt solution, or by adding a fluoride salt to a lead salt, such aspotassium fluoride to alead(II) nitrate solution,[4]
orsodium fluoride to alead(II) acetate solution.
It appears as the very rare mineralfluorocronite.[5][6]
Lead(II) fluoride is used in low meltingglasses, in glass coatings to reflectinfrared rays, inphosphors for television-tube screens, and as a catalyst for the manufacture ofpicoline.[3] TheMuon g−2 experiment usesPbF
2 crystals in conjunction with siliconphotomultipliers. High energy charged particles createCerenkov light as they pass through the crystals, which is measured by the silicon photomultipliers.[7][8]
It also serves as aoxygen scavenger in high-temperaturefluorine chemistry, asplumbous oxide is relativelyvolatile.[9]
