Ytterbium(II) fluoride
Other names
Ytterbium difluoride
3D model (JSmol)
  • InChI=1S/2FH.Yb/h2*1H;/q;;+2/p-2
  • [F-].[F-].[Yb+2]
Molar mass 211.042 g·mol−1
Appearance gray crystals
Density g/cm3
Melting point 1,407 °C (2,565 °F; 1,680 K)
Boiling point 2,380 °C (4,320 °F; 2,650 K)
Fluorite structure
Fm3m (No. 225)
a = 559.93 pm
Related compounds
Other anions
Ytterbium(II) chloride
Ytterbium(II) iodide
Other cations
Samarium(II) fluoride
Europium(II) fluoride
Thulium(II) fluoride
Related compounds
Ytterbium(III) fluoride
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Ytterbium(II) fluoride is a binary inorganic compound of ytterbium and fluorine with the chemical formula YbF2.[2][3][4]


Ytterbium(II) fluoride can be obtained by reacting ytterbium(III) fluoride with ytterbium or hydrogen.

2YbF3 + Yb → 3YbF2
2YbF3 + H2 → 2YbF2 + 2HF

Physical properties

Ytterbium(II) fluoride is a gray solid and crystallizes in the so-called fluorite type analogous to calcium fluoride with a unit cell a axis of 559.46 pm. In the crystal structure of ytterbium(II) fluoride, the Yb2+ cation is surrounded by eight F anions in the form of a cube, which is tetrahedrally surrounded by four Yb2+.[5]


  1. ^ Greis, Ortwin; Haschke, John M. (1982). "Chapter 45 Rare earth fluorides". Handbook on the Physics and Chemistry of Rare Earths Volume 5. Vol. 5. Elsevier. pp. 387–460. doi:10.1016/s0168-1273(82)05008-9. ISBN 9780444863751. ISSN 0168-1273.
  2. ^ Meyer, G.; Morss, L. R. (6 December 2012). Synthesis of Lanthanide and Actinide Compounds. Springer Science & Business Media. p. 57. ISBN 978-94-011-3758-4. Retrieved 5 April 2023.
  3. ^ Yaws, Carl (6 January 2015). The Yaws Handbook of Physical Properties for Hydrocarbons and Chemicals: Physical Properties for More Than 54,000 Organic and Inorganic Chemical Compounds, Coverage for C1 to C100 Organics and Ac to Zr Inorganics. Gulf Professional Publishing. p. 807. ISBN 978-0-12-801146-1. Retrieved 5 April 2023.
  4. ^ Macintyre, Jane E. (23 July 1992). Dictionary of Inorganic Compounds. CRC Press. p. 3160. ISBN 978-0-412-30120-9. Retrieved 5 April 2023.
  5. ^ Reckeweg, Olaf; DiSalvo, Francis J. (1 December 2017). "Single-crystal structure refinement of YbF2 with a remark about YbH2". Zeitschrift für Naturforschung B. 72 (12): 995–998. doi:10.1515/znb-2017-0147. ISSN 1865-7117. S2CID 102902501. Retrieved 5 April 2023.