Berkelium (IV) fluoride

Crystal structure
	__ Bk 4+ __ F -
Crystal system	monoclinic
Space group	C 2 / c (No. 15)
Lattice parameters	a = 1247 pm ; b = 1058 pm ; c = 817 pm
General
Surname	Berkelium (IV) fluoride
other names	Berkelium tetrafluoride
Ratio formula	BkF 4
Brief description	yellow-green solid
External identifiers / databases
Wikidata	Q820875
properties
Molar mass	323.064 g mol −1
Physical state	firmly
Hazard and safety information
	; Radioactive
GHS hazard labeling ; no classification available
GHS hazard labeling ; no classification available
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Berkelium (IV) fluoride is a fluoride of the artificial element and actinoid Berkelium with the empirical formula BkF ₄ . In this salt , Berkelium occurs in the oxidation state +4.

presentation

Berkelium (IV) fluoride can be prepared from the elements at temperatures of 400 ° C and increased pressure.

{\ displaystyle {\ ce {Bk + 2 F2 -> BkF4}}}

properties

Berkelium (IV) fluoride is a yellow-green ion compound consisting of Bk ⁴⁺ and F ^- ions. It crystallizes in the monoclinic crystal system in the space group C 2 / c (No. 15) with the lattice parameters a = 1247 pm , b = 1058 pm and c = 817 pm with β = 125.9 ° and twelve formula units per unit cell . Its crystal structure is isotype with uranium (IV) fluoride . Template: room group / 15

Through β-decay arises from berkelium (IV) fluoride ( ²⁴⁹ BkF ₄ ) the Californium (IV) fluoride ( ²⁴⁹ CfF ₄ ).

safety instructions

Classifications according to the CLP regulation are not available because they only include chemical hazard and play a completely subordinate role compared to the hazards based on radioactivity . The latter also only applies if the amount of substance involved is relevant.

Individual evidence

^ AF Holleman , E. Wiberg , N. Wiberg : Textbook of Inorganic Chemistry . 102nd edition. Walter de Gruyter, Berlin 2007, ISBN 978-3-11-017770-1 , p. 1969.
↑ The hazards emanating from radioactivity do not belong to the properties to be classified according to the GHS labeling. With regard to other hazards, this substance has either not yet been classified or a reliable and citable source has not yet been found.
↑ ^a ^b L. B. Asprey, TK Keenan: The Preparation of Berkelium Tetrafluoride and its Lattice Parameters , in: Inorg. Nucl. Chem. Lett. , 1968 , 4 (9), pp. 537-541 ( doi : 10.1016 / 0020-1650 (68) 80028-5 ).
↑ Gmelin's Handbook of Inorganic Chemistry , System No. 71, Transurane, Part C, p. 106.
↑ Thomas K. Keenan, Larned B. Asprey: Lattice Constants of Actinide Tetrafluorides Including Berkelium , in: Inorg. Chem. , 1969 , 8 (2), pp. 235-238 ( doi : 10.1021 / ic50072a011 ).
^ LB Asprey, RG Haire: "On the Actinide Tetrafluoride Lattice Parameters", in: Inorg. Nucl. Chem. Lett. , 1973 , 9 (11), pp. 1121-1128 ( doi : 10.1016 / 0020-1650 (73) 80017-0 ).
^ RA Penneman, RR Ryan, A. Rosenzweig: Structural systematics in actinide fluoride complexes , in: Structure & Bonding , 1973 , 13 , pp. 1-52.
↑ HO Haug, RD Baybarz: Lattice parameter of the actinides tetra fluoride UF ₄ , BkF ₄ , and CfF ₄ , in: Inorg. Nucl. Chem. Lett. , 1975 , 11 (13), pp. 847-855 ( doi : 10.1016 / 0020-1650 (75) 80112-7 ).
↑ DD Ensor, JR Peterson, RG Haire, JP Young: Absorption Spectrophotometric Study of Berkelium (III) and (IV) Fluorides in the Solid State , in: J. Inorg. Nucl. Chem. , 1981 , 43 (5), pp. 1001-1003 ( doi : 10.1016 / 0022-1902 (81) 80164-9 ).
^ JE Macintyre, FM Daniel, VM Stirling: Dictionary of inorganic compounds , Chapman and Hall, CRC Press, 1992, ISBN 978-0-412-30120-9 , p. 2826.

literature

David E. Hobart, Joseph R. Peterson: Berkelium , in: Lester R. Morss, Norman M. Edelstein, Jean Fuger (Eds.): The Chemistry of the Actinide and Transactinide Elements , Springer, Dordrecht 2006; ISBN 1-4020-3555-1 , pp. 1444-1498 ( doi : 10.1007 / 1-4020-3598-5_10 ).

[HOWI_1969-1] AF Holleman , E. Wiberg , N. Wiberg : Textbook of Inorganic Chemistry . 102nd edition. Walter de Gruyter, Berlin 2007, ISBN 978-3-11-017770-1 , p. 1969.

[NV-2] The hazards emanating from radioactivity do not belong to the properties to be classified according to the GHS labeling. With regard to other hazards, this substance has either not yet been classified or a reliable and citable source has not yet been found.

[Keenan-3] L. B. Asprey, TK Keenan: The Preparation of Berkelium Tetrafluoride and its Lattice Parameters , in: Inorg. Nucl. Chem. Lett. , 1968 , 4 (9), pp. 537-541 ( doi : 10.1016 / 0020-1650 (68) 80028-5 ).

[Gmelin-4] Gmelin's Handbook of Inorganic Chemistry , System No. 71, Transurane, Part C, p. 106.

[5] Thomas K. Keenan, Larned B. Asprey: Lattice Constants of Actinide Tetrafluorides Including Berkelium , in: Inorg. Chem. , 1969 , 8 (2), pp. 235-238 ( doi : 10.1021 / ic50072a011 ).

[6] LB Asprey, RG Haire: "On the Actinide Tetrafluoride Lattice Parameters", in: Inorg. Nucl. Chem. Lett. , 1973 , 9 (11), pp. 1121-1128 ( doi : 10.1016 / 0020-1650 (73) 80017-0 ).

[7] RA Penneman, RR Ryan, A. Rosenzweig: Structural systematics in actinide fluoride complexes , in: Structure & Bonding , 1973 , 13 , pp. 1-52.

[8] HO Haug, RD Baybarz: Lattice parameter of the actinides tetra fluoride UF ₄ , BkF ₄ , and CfF ₄ , in: Inorg. Nucl. Chem. Lett. , 1975 , 11 (13), pp. 847-855 ( doi : 10.1016 / 0020-1650 (75) 80112-7 ).

[BKF_3_4-9] DD Ensor, JR Peterson, RG Haire, JP Young: Absorption Spectrophotometric Study of Berkelium (III) and (IV) Fluorides in the Solid State , in: J. Inorg. Nucl. Chem. , 1981 , 43 (5), pp. 1001-1003 ( doi : 10.1016 / 0022-1902 (81) 80164-9 ).

[dictic-10] JE Macintyre, FM Daniel, VM Stirling: Dictionary of inorganic compounds , Chapman and Hall, CRC Press, 1992, ISBN 978-0-412-30120-9 , p. 2826.