Lead_difluoride

Lead(II) fluoride

Lead(II) fluoride

Chemical compound

Lead(II) fluoride is the inorganic compound with the formula PbF2. It is a white solid. The compound is polymorphic, at ambient temperatures it exists in orthorhombic (PbCl2 type) form, while at high temperatures it is cubic (Fluorite type).[2]

Quick Facts Names, Identifiers ...

Preparation

Lead(II) fluoride can be prepared by treating lead(II) hydroxide or 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 glasses, in glass coatings to reflect infrared rays, in phosphors for television-tube screens, and as a catalyst for the manufacture of picoline.[3] The Muon g−2 experiment uses PbF
2 scintillators in conjunction with silicon photomultipliers.[7]

References

  1. [1]
    NIST-data review 1980
  2. [2]
    Haines, J.; Léger, J. M.; Schulte, O. (1998-04-01). "High-pressure isosymmetric phase transition in orthorhombic lead fluoride". Physical Review B. 57 (13). American Physical Society (APS): 7551–7555. Bibcode:1998PhRvB..57.7551H. doi:10.1103/physrevb.57.7551. ISSN 0163-1829.
  3. [3]
    Carr, Dodd S. "Lead Compounds". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a15_249. ISBN 978-3527306732.
  4. [4]
    Arnold Hollemann, Egon Wiberg, 101st ed., de Gruyter 1995 Berlin; ISBN 3-11-012641-9
  5. [5]
    "Fluorocronite".
  6. [6]
    "List of Minerals". 21 March 2011.
  7. [7]
    Grange, J.; et al. (Muon g−2 Collaboration) (Jan 27, 2015). "Muon (g−2) Technical Design Report". arXiv:1501.06858. Bibcode:2015arXiv150106858G. {{cite journal}}: Cite journal requires |journal= (help) Via inSPIRE
Share this article:

This article uses material from the Wikipedia article Lead_difluoride, and is written by contributors. Text is available under a CC BY-SA 4.0 International License; additional terms may apply. Images, videos and audio are available under their respective licenses.