Europium(II) fluoride

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Europium(II) fluoride
IUPAC name
Europium(II) fluoride
Other names
Europium difluoride
3D model (JSmol)
ECHA InfoCard 100.203.721 Edit this at Wikidata
  • InChI=1S/Eu.2FH/h;2*1H/q+2;;/p-2
  • F[Eu]F
  • [F-].[F-].[Eu+2]
Molar mass 189.96
Appearance dark yellowish solid[1]
Density 6.495 g·cm−3
GHS labelling:
GHS06: Toxic
P264, P270, P301+P310, P321, P330, P405, P501
Related compounds
Other anions
Europium(II) bromide
Europium(II) chloride
Related compounds
Europium(III) fluoride
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Europium(II) fluoride is an inorganic compound with a chemical formula EuF2. It was first synthesized in 1937.[1]


Europium(II) fluoride can be produced by reducing europium(III) fluoride with metallic europium or hydrogen gas[2]


Europium(II) fluoride is a bright yellowish solid with a fluorite structure.[2]

EuF2 can be used to dope a trivalent rare-earth fluoride, such as LaF3, to create a vacancy-filled structure with increased conductivity over a pure crystal. Such a crystal can be used as a fluoride-specific semipermeable membrane in a fluoride selective electrode to detect trace quantities of fluoride.[3][4]


  1. ^ a b Zhao Yongzhi, Ma Ying, Hou Shaochun, Zhang Wenjuan, Wang Jingjing, Ding Yanrong, Hao Yifan. 氟化亚铕研究现状 (lit. Research Progress of Europium(II) Fluoride). Chinese Rare Earths, 2017. 38 (5): 134-140. (in Chinese)
  2. ^ a b Georg Brauer: Handbuch der Präparativen Anorganischen Chemie. 3., umgearb. Auflage. Band I. Enke, Stuttgart 1975, ISBN 3-432-02328-6, S. 255.
  3. ^ Light, Truman S.; Cappuccino, Carleton C. (April 1975). "Determination of fluoride in toothpaste using an ion-selective electrode". Journal of Chemical Education. 52 (4): 247–250. Bibcode:1975JChEd..52..247L. doi:10.1021/ed052p247. PMID 1133123.
  4. ^ Frant, Martin S.; Ross, James W. (23 December 1966). "Electrode for Sensing Fluoride Ion Activity in Solution" (PDF). Science. 154 (3756): 1553–1555. Bibcode:1966Sci...154.1553F. doi:10.1126/science.154.3756.1553. JSTOR 1720460. PMID 5924922. S2CID 11042445.