Lead(II) fluoride

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Lead(II) fluoride
Fluorid olovnatý.PNG
CaF2 polyhedra.png
Identifiers
CAS number 7783-46-2 YesY
PubChem 24549
Properties
Molecular 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
Boiling point 1293°C
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
LD50 3031 mg/kg (oral, rat)
Related compounds
Other anions Lead(II) chloride
Lead(II) bromide
Lead(II) iodide
Except where noted otherwise, 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[edit]

Lead(II) fluoride is used:

Preparation[edit]

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[edit]

  1. ^ NIST-data review 1980
  2. ^ Arnold Hollemann, Egon Wiberg, 101st ed., de Gruyter 1995 Berlin; ISBN 3-11-012641-9