Berkelium(III) fluoride
Names
Other names
berkelium trifluoride
Identifiers
InChI=1S/Bk.3FH/h;3*1H/q+3;;;/p-3
Key: DAFXIOTWBMWEKP-UHFFFAOYSA-K
Properties
Bk F 3
Molar mass
304 g·mol−1
Appearance
yellow-green solid
Density
9.70 g/cm3
Related compounds
Related compounds
Berkelium tetrafluoride Einsteinium(III) fluoride
Except where otherwise noted, data are given for materials in their
standard state (at 25 °C [77 °F], 100 kPa).
Chemical compound
Berkelium(III) fluoride is a binary inorganic compound of berkelium and fluorine with the chemical formula BkF3 .[ 1] [ 2] [ 3]
Synthesis
The compound can be prepared by treating Bk2 O3 with a gaseous mixture of H2 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 (YF3 structure), with lattice parameters a = 670 pm, b = 709 pm, and c = 441 pm. At high temperature, it is trigonal (LaF3 structure), with lattice parameters a = 697 pm and c = 714 pm. The transition temperature of BkF3 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
^ 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 .
^ 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 .
^ "WebElements Periodic Table » Berkelium » berkelium trifluoride" . webelements.com. Retrieved 11 April 2023 .
^ Mi͡asoedov, Boris Fedorovich (1974). Analytical Chemistry of Transplutonium Elements . Wiley . p. 97. ISBN 978-0-470-62715-0 . Retrieved 11 April 2023 .
^ 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 .
^ 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 .
^ 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 .
Salts and covalent derivatives of the
fluoride ion