Curium (IV) fluoride

Crystal structure
	__ cm 4+ __ F -
Crystal system	monoclinic
Space group	C 2 / c (No. 15)
Lattice parameters	a = 1250 pm; b = 1049 pm ; c = 818 pm
General
Surname	Curium (IV) fluoride
other names	Curium tetrafluoride
Ratio formula	CmF 4
Brief description	brown solid
External identifiers / databases
Wikidata	Q1144613
properties
Molar mass	depending on the isotope: 314–326 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 .

Curium (IV) fluoride is a fluoride of the artificial element and actinide curium with the empirical formula CmF ₄ . In this salt , curium occurs in the +4 oxidation state. Since all isotopes of curium are only artificially produced, it has no natural occurrence.

presentation

The synthesis of curium (IV) fluoride takes place via the oxidative fluorination of curium (III) fluoride .

{\ displaystyle {\ ce {2 CmF3 + F2 -> 2 CmF4}}}

properties

Curium (IV) fluoride is a brown ionic compound consisting of Cm ⁴⁺ and F ^- ions. It crystallizes in the monoclinic crystal system in the space group C 2 / c (space group no. 15) with the lattice parameters a = 1250 pm , b = 1049 pm and c = 818 pm and twelve formula units per unit cell . Its crystal structure is isotype with uranium (IV) fluoride . Template: room group / 15

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.

literature

Gregg J. Lumetta, Major C. Thompson, Robert A. Penneman, P. Gary Eller: Curium , 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. 1397-1443 ( doi : 10.1007 / 1-4020-3598-5_9 ).

Individual evidence

↑ ^a ^b Gregg J. Lumetta, Major C. Thompson, Robert A. Penneman, P. Gary Eller: Curium , in: Lester R. Morss, Norman M. Edelstein, Jean Fuger (ed.): The Chemistry of the actinides and Transactinide Elements , Springer, Dordrecht 2006; ISBN 1-4020-3555-1 , pp. 1397-1443 ( doi : 10.1007 / 1-4020-3598-5_9 ).
↑ 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.
^ LB Asprey, RG Haire: On the Actinide Tetrafluoride Lattice Parameters , in: Inorg. Nucl. Chem. Lett. , 1973 , 9 , 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. doi : 10.1007 / 3-540-06125-8_1 .
↑ 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 , pp. 847-855 ( doi: 10.1016 / 0020-1650 (75) 80112-7 ).

[Morrs-1] Gregg J. Lumetta, Major C. Thompson, Robert A. Penneman, P. Gary Eller: Curium , in: Lester R. Morss, Norman M. Edelstein, Jean Fuger (ed.): The Chemistry of the actinides and Transactinide Elements , Springer, Dordrecht 2006; ISBN 1-4020-3555-1 , pp. 1397-1443 ( doi : 10.1007 / 1-4020-3598-5_9 ).

[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.

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

[4] RA Penneman, RR Ryan, A. Rosenzweig: Structural systematics in actinide fluoride complexes , in: Structure & Bonding , 1973 , 13 , pp. 1-52. doi : 10.1007 / 3-540-06125-8_1 .

[5] 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 , pp. 847-855 ( doi: 10.1016 / 0020-1650 (75) 80112-7 ).