Lead(II) fluoride

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Lead(II) fluoride
Names
Other names
Lead difluoride
plumbous fluoride
Identifiers
3D model (
JSmol
)
ChemSpider
ECHA InfoCard
 100.029.089 Edit this at Wikidata
UNII
  • InChI=1S/2FH.Pb/h2*1H;/q;;+2/p-2
    Key: FPHIOHCCQGUGKU-UHFFFAOYSA-L
  • F[Pb]F
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
Other cations
Stannous fluoride
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Lead(II) fluoride is the

polymorphic, at ambient temperatures it exists in orthorhombic (PbCl2 type) form, while at high temperatures it is cubic (Fluorite type).[2]

Preparation

Lead(II) fluoride can be prepared by treating

lead(II) carbonate with hydrofluoric acid:[3]

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 a fluoride salt to a lead salt, such as potassium fluoride to a lead(II) nitrate solution, [4]

2 KF + Pb(NO3)2 → PbF2 + 2 KNO3

or sodium fluoride to a lead(II) acetate solution.

2 NaF + Pb(CH3COO)2 → PbF2 + 2 NaCH3COO

It appears as the very rare mineral fluorocronite.[5][6]

Uses

Two 25 mm × 25 mm × 140 mm PbF
2 scintillator crystals used in the Muon g−2 experiment.

Lead(II) fluoride is used in low melting

Muon g−2 experiment uses PbF
2 scintillators in conjunction with silicon photomultipliers.[7]

References

  1. ^ NIST-data review 1980
  2. ISSN 0163-1829
    .
  3. ^
    ISBN 978-3527306732
    .
  4. ISBN 3-11-012641-9
  5. ^ "Fluorocronite".
  6. ^ "List of Minerals". 21 March 2011.
  7. Bibcode:2015arXiv150106858G. {{cite journal}}: Cite journal requires |journal= (help) Via inSPIRE
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