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Berkelium tetrafluoride
Names
Other names
berkelium(IV) fluoride
Identifiers
InChI=1S/Bk.4FH/h;4*1H/q+4;;;;/p-4
Key: RCTCKHUWZHELJP-UHFFFAOYSA-J
[Bk+4].[F-].[F-].[F-].[F-]
Properties
Bk F 4
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).
Chemical compound
Berkelium tetrafluoride is a binary
inorganic compound of
berkelium and
fluorine with the chemical formula BkF4 .
[1]
Synthesis
Berkelium tetrafluoride may be formed by the fluorination of
berkelium trioxide , dioxide, or trifluoride with elemental fluorine at elevated temperatures:
2Bk2 O3 + 8F2 → 4BkF4 + 3O2
2BkF3 + F2 → 2BkF4
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°.
[2]
[3]
Chemical properties
Berkelium tetrafluoride is reduced by
lithium at elevated temperatures to metallic berkelium:
[4]
BkF4 + 4Li → Bk + 4LiF
References
^ 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 .
Salts and covalent derivatives of the
fluoride ion