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Synthesis

Berkelium tetrafluoride may be formed by the fluorination of berkelium trioxide, dioxide, or trifluoride with elemental fluorine at elevated temperatures:

Physical properties

Berkelium(IV) fluoride forms light brown crystals of monoclinic crystal structure of uranium tetrafluoride type. Cell parameters: a = 1.2396 nm, b = 1.0466 nm, c = 0.8118 nm, angle β = 126.33°.²³

Chemical properties

Berkelium tetrafluoride is reduced by lithium at elevated temperatures to metallic berkelium:⁴

References

1. Cunningham, B. B. (January 1959). "Berkelium and californium". Journal of Chemical Education. 36 (1): 32. doi:10.1021/ed036p32. ISSN 0021-9584. Retrieved 5 April 2023. https://pubs.acs.org/doi/10.1021/ed036p32 ↩

2. Keenan, Thomas K.; Asprey, Larned B. (February 1969). "Lattice constants of actinide tetrafluorides including berkelium". Inorganic Chemistry. 8 (2): 235–238. doi:10.1021/ic50072a011. ISSN 0020-1669. Retrieved 5 April 2023. https://pubs.acs.org/doi/abs/10.1021/ic50072a011 ↩

3. Asprey, L. B.; Keenan, T. K. (1 September 1968). "The preparation of berkelium tetrafluoride and its lattice parameters (1)". Inorganic and Nuclear Chemistry Letters. 4 (9): 537–541. doi:10.1016/0020-1650(68)80028-5. ISSN 0020-1650. Retrieved 5 April 2023. https://www.sciencedirect.com/science/article/abs/pii/0020165068800285 ↩

4. 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 5 April 2023. 978-1-4831-9051-8 ↩