Berkelium tetrafluoride
-fluorid.png) | |
| Names | |
|---|---|
| Other names berkelium(IV) fluoride | |
| Identifiers | |
3D model (JSmol) | |
| |
| |
| Properties | |
| BkF4 | |
| Molar mass | 323 g·mol−1 |
| Appearance | yellow-green solid |
| practically insoluble | |
| Structure | |
| monoclinic | |
| Related compounds | |
Related compounds | Curium(III) fluoride, berkelium trifluoride |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
Berkelium tetrafluoride is a binary inorganic compound of berkelium and fluorine with the chemical formula BkF4.[1]
Synthesis
[edit]Berkelium tetrafluoride may be formed by the fluorination of berkelium trioxide, dioxide, or trifluoride with elemental fluorine at elevated temperatures:
- 2Bk2O3 + 8F2 → 4BkF4 + 3O2
- 2BkF3 + F2 → 2BkF4
Physical properties
[edit]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°.[2][3]
Chemical properties
[edit]Berkelium tetrafluoride is reduced by lithium at elevated temperatures to metallic berkelium:[4]
- BkF4 + 4Li → Bk + 4LiF
References
[edit]- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.