Lead(II) fluoride

Lead(II) fluoride

Names
Other names Lead difluoride plumbous fluoride
Identifiers
CAS Number	7783-46-2 Y
ECHA InfoCard	100.029.089
PubChem	24549
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)
Solubility in water	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; insoluble in acetone and ammonia
Structure
Crystal structure	Fluorite (cubic), cF12
Space group	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).
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Infobox references

Lead(II) fluoride (PbF₂) is a chemical compound that is an odorless white solid.

Conditions/substances to avoid are: strong oxidizers.

Uses

Lead(II) fluoride is used:

• 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 several methods. It is obtained by treating lead(II) hydroxide or lead(II) carbonate with hydrofluoric acid, followed by evaporation of the solution:

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.^[2]

2 KF + Pb(NO₃)₂ → PbF₂ + 2 KNO₃

References