Lead fluorochloride Names Other namesLead fluoride chloride, lead fluoro-chloride
Identifiers InChI=1S/ClH.FH.Pb/h2*1H;/q;;+2/p-2
Key: FVEZKDUIAKYNFW-UHFFFAOYSA-L
Properties PbFCl Appearance colorless crystals Density 7.11 g/cm3 [ 1] Melting point 603 °C (1,117 °F; 876 K) Structure tetragonal P 4/mmm Related compounds Related compounds
Except where otherwise noted, data are given for materials in their
standard state (at 25 °C [77 °F], 100 kPa).
Chemical compound
Lead fluorochloride orlead fluoride chloride is an inorganic compound oflead ,fluorine , andchlorine with the chemical formulaPbFCl .[ 2]
Natural occurrences [ edit ] The mineralmatlockite with the chemical formula PbFCl was discovered in the early 1800s at Bage Mine inBolehill nearMatlock , alongsidephosgenite andanglesite specimens. While phosgenite had already been identified by that time, it appears that matlockite was not officially recognized as a distinct new mineral for approximately 50 years after its discovery.[ 3]
The compound can be obtained by meltingPbF2 PbCl2 [ 4]
PbF2 + PbCl2 → 2PbFCl An exchange reaction of acidified solutions oflead nitrate ,potassium chloride , andpotassium fluoride :
Pb(NO3 )2 + KF + KCl → PbClF + 2KNO3 Physical properties [ edit ] The compound forms crystals of layeredtetragonal system , space groupP 4/mmm . Unit cell dimensions area = 4.111 Å,c = 7.226 Å,V = 122.1 Å3 .[ 5]
Pure lead fluorochloride is transparent between 270 and 800 nm. It isfluorescent under UV light.[ 5]
^ Chen, Jianming; Shen, Dingzhong; Ren, Guohao; Mao, Rihua; Yin, Zhiwen (24 February 2004)."A high-density inorganic scintillator: lead fluoride chloride" Journal of Physics D: Applied Physics 37 (6):938– 941.Bibcode :2004JPhD...37..938C .doi :10.1088/0022-3727/37/6/020 .ISSN 0022-3727 . Retrieved17 July 2025 . ^ Volborth, Alexis (2 December 2012).Elemental Analysis in Geochemistry Elsevier . p. 125.ISBN 978-0-444-60151-3 . Retrieved17 July 2025 . ^ "Matlockite (Matlockite)" . Rock Identifier. Retrieved17 July 2025 .^ Lieth, R. M. A. (29 June 2013).Preparation and Crystal Growth of Materials with Layered Structures Springer Science & Business Media . p. 47.ISBN 978-94-017-2750-1 . Retrieved16 July 2025 . ^a b Chen, Jianming; Shen, Dingzhong; Mao, Rihua; Ren, Guohao; Yin, Zhiwen (1 April 2003)."Crystal growth of PbFCl by modified Bridgman method" Journal of Crystal Growth 250 (3):393– 396.Bibcode :2003JCrGr.250..393C .doi :10.1016/S0022-0248(02)02353-9 .ISSN 0022-0248 . Retrieved17 July 2025 .
Salts and covalent derivatives of the
fluoride ion
PF− 6 ,AsF− 6 ,SbF− 6 compoundsAlF2− 5 ,AlF3− 6 compoundschlorides, bromides, iodides SiF2− 6 ,GeF2− 6 compoundsOxyfluorides Organofluorides with transition metal, nitric acids bifluorides thionyl, phosphoryl,
