Berkelium(III) fluoride

Berkelium(III) fluoride is a binary inorganic compound of berkelium and fluorine with the chemical formula BkF
3.[1][2][3]

Berkelium(III) fluoride
Names
Other names
berkelium trifluoride
Identifiers
3D model (JSmol)
  • InChI=1S/Bk.3FH/h;3*1H/q+3;;;/p-3
    Key: DAFXIOTWBMWEKP-UHFFFAOYSA-K
  • [Bk+3].[F-].[F-].[F-]
Properties
BkF3
Molar mass 304 g·mol−1
Appearance yellow-green solid
Density 9.70 g/cm3
Related compounds
Related compounds
 Berkelium tetrafluoride
Einsteinium fluoride
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Synthesis

The compound can be prepared by treating Bk
2O
3 with a gaseous mixture of H
2 and HF at 600 °C.[4]

Physical properties

Berkelium trifluoride forms a yellow-green solid with two structures.[5] At low temperature, it is orthorhombic (YF
3 structure), with lattice parameters a = 670 pm, b = 709 pm, and c = 441 pm. At high temperature, it is trigonal (LaF
3 structure), with lattice parameters a = 697 pm and c = 714 pm. The transition temperature of BkF
3 is between 350 and 600 °C.[6][7]

Chemical properties

Berkelium trifluoride is reduced by lithium to obtain metallic berkelium:

BkF3 + 3Li → Bk + 3LiF

References
  1. Peterson, J. R.; Cunningham, B. B. (1 August 1968). "Crystal structures and lattice parameters of the compounds of berkelium—IV berkelium trifluoride". Journal of Inorganic and Nuclear Chemistry. 30 (7): 1775–1784. doi:10.1016/0022-1902(68)80353-7. ISSN 0022-1902. Retrieved 11 April 2023.
  2. Edelstein, Norman M. (11 September 2013). Actinides in Perspective: Proceedings of the Actinides—1981 Conference, Pacific Grove, California, USA, 10-15 September 1981. Elsevier. p. 334. ISBN 978-1-4831-9051-8. Retrieved 11 April 2023.
  3. "WebElements Periodic Table » Berkelium » berkelium trifluoride". webelements.com. Retrieved 11 April 2023.
  4. Mi͡asoedov, Boris Fedorovich (1974). Analytical Chemistry of Transplutonium Elements. Wiley. p. 97. ISBN 978-0-470-62715-0. Retrieved 11 April 2023.
  5. Ahrland, S.; Bagnall, K. W.; Brown, D. (7 June 2016). The Chemistry of the Actinides: Comprehensive Inorganic Chemistry. Elsevier. p. 161. ISBN 978-1-4831-5934-8. Retrieved 11 April 2023.
  6. Peterson, J. R.; Fahey, J. A.; Baybarz, R. D. (1 October 1971). "The crystal structures and lattice parameters of berkelium metal". Journal of Inorganic and Nuclear Chemistry. 33 (10): 3345–3351. doi:10.1016/0022-1902(71)80656-5. ISSN 0022-1902. Retrieved 11 April 2023.
  7. Ensor, D. D.; Peterson, J. R.; Haire, R. G.; Young, J. P. (1 January 1981). "Absorption spectrophotometric study of berkelium(III) and (IV) fluorides in the solid state". Journal of Inorganic and Nuclear Chemistry. 43 (5): 1001–1003. doi:10.1016/0022-1902(81)80164-9. ISSN 0022-1902. Retrieved 11 April 2023.
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