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| Names | |
|---|---|
| Other names Lead difluoride plumbous fluoride | |
| Identifiers | |
3D model (JSmol) | |
| ChemSpider | |
| ECHA InfoCard | 100.029.089  |
PubChem CID | |
| UNII | |
CompTox Dashboard (EPA) | |
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SMILES
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| Properties | |
Chemical formula | 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 x 10−8 (20 °C) |
| Solubility | soluble in nitric acid and hydrochloric acid; insoluble in acetone and ammonia |
| −-58.1·10−6 cm3/mol | |
| Structure | |
Crystal structure | Fluorite (cubic), cF12 |
| Fm3m, No. 225 | |
| Hazards | |
| Lethal dose or concentration (LD, LC): | |
LD50 (median dose) | 3031 mg/kg (oral, rat) |
| Related compounds | |
Other anions | Lead(II) chloride Lead(II) bromide Lead(II) iodide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
Lead(II) fluoride is the inorganic compound with the formula PbF2. It is a white solid. It exists as both an orthorhombic and cubic forms.
Uses
Lead(II) fluoride is used:[2]
- in low melting glasses
- in glass coatings to reflect infrared rays
- in phosphors for television-tube screens
- as a catalyst for the manufacture of picoline
Preparation
Lead(II) fluoride can be prepared by treating lead(II) hydroxide or lead(II) carbonate with hydrofluoric acid:[2]
- Pb(OH)2 + 2 HF → PbF2 + 2 H2O
Alternatively, it is precipitated by adding hydrofluoric acid to a lead(II) salt solution, or by adding potassium fluoride to a lead(II) nitrate solution.[3]
- 2 KF + Pb(NO3)2 → PbF2 + 2 KNO3
It appears as the very rare mineral fluorocronite.[4][5]
References
- ^ NIST-data review 1980
- ^ a b Carr, Dodd S. "Lead Compounds". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a15_249.
- ^ Arnold Hollemann, Egon Wiberg, 101st ed., de Gruyter 1995 Berlin; ISBN 3-11-012641-9
- ^ https://www.mindat.org/min-40179.html
- ^ https://www.ima-mineralogy.org/Minlist.htm