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Lead(II) fluoride

Lead(II) fluoride
Fluorid olovnatý.PNG
CaF2 polyhedra.png
Names
Other names
Lead difluoride
plumbous fluoride
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.029.089
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]
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
Fluorite (cubic), cF12
Fm3m, No. 225
Hazards
Lethal dose or concentration (LD, LC):
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 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]

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 rare mineral fluorocronite.[4]

References

  1. ^ NIST-data review 1980
  2. ^ a b Carr, Dodd S. "Lead Compounds". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a15_249.
  3. ^ Arnold Hollemann, Egon Wiberg, 101st ed., de Gruyter 1995 Berlin; ISBN 3-11-012641-9
  4. ^ [www.mindat.org]