Cobalt (II) fluoride

Crystal structure
	__ Co 2+ __ F -
Crystal system	tetragonal
Space group	P 4 2 / mnm (No. 136)
Lattice parameters	a = 469.50 (7) pm ; c = 318.17 (5) pm ; V = 70.10 Å 3; Z = 2
Coordination numbers	Co = 3, F = 6
General
Surname	Cobalt (II) fluoride
other names	Cobalt difluoride
Ratio formula	CoF 2
Brief description	rose-red solid
External identifiers / databases
ECHA InfoCard	100.030.044
PubChem	24820
Wikidata	Q417121
properties
Molar mass	96.93 g mol −1
Physical state	firmly
density	4.43 g cm −3 at 25 ° C; 2.19 g cm −3 at 25 ° C (tetrahydrate);
Melting point	1200 ° C
boiling point	1400 ° C
solubility	slightly soluble in water (14.15 g / l, 25 ° C); Easily soluble in mineral acids when hot;
safety instructions
H and P phrases	H: 301-314
	P: 280-301 + 310-305 + 351 + 338-310
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Cobalt (II) fluoride is a chemical compound of cobalt from the group of fluorides .

Extraction and presentation

Cobalt (II) fluoride can be obtained by reacting cobalt (II) chloride or cobalt (II) carbonate with hydrogen fluoride .

{\ displaystyle \ mathrm {CoCl_ {2} +2 \ HF \ longrightarrow CoF_ {2} +2 \ HCl}}

properties

Cobalt (II) fluoride is a rose-red solid that is sparingly soluble in water. It has a crystal structure of the rutile type and also occurs as di-, tri- and tetrahydrate.

use

Cobalt (II) fluoride can be used as a catalyst for the production of perfluorocarbons .

Individual evidence

↑ ^a ^b ^c M. MR Costa, JA Paixão, MJM de Almeida, LCR Andrade: Charge densities of two rutile structures: NiF ₂ and CoF ₂ . In: Acta crystallographica. Section B, Structural science . tape 49 , no. 4 , 1993, p. 591-599 , doi : 10.1107 / S0108768193001624 .
↑ ^a ^b ^c ^d Georg Brauer (Ed.), With the collaboration of Marianne Baudler a . a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , p. 275.
↑ ^a ^b ^c Datasheet Cobalt (II) fluoride, powder from Sigma-Aldrich , accessed on January 16, 2012 ( PDF ).
↑ Data sheet Cobalt (II) fluoride tetrahydrate, 99.99% trace metals basis from Sigma-Aldrich , accessed on January 16, 2012 ( PDF ).
↑ ^a ^b Web elements: Cobalt difluoride
↑ RH Carter: Solubilities of Some Inorganic Flurides in Water at 25 ° C . In: Industrial & Engineering Chemistry . tape 20 , no. 11 , 1928, pp. 1195 , doi : 10.1021 / ie50227a024 .
↑ Entry on Cobaltous fluoride in the Hazardous Substances Data Bank , accessed July 27, 2012.
^ AK Srivastava, PC Jain: Chemistry. 2008, ISBN 81-88597-83-X , p. 827 ( limited preview in Google Book Search).

[Costa-1] M. MR Costa, JA Paixão, MJM de Almeida, LCR Andrade: Charge densities of two rutile structures: NiF ₂ and CoF ₂ . In: Acta crystallographica. Section B, Structural science . tape 49 , no. 4 , 1993, p. 591-599 , doi : 10.1107 / S0108768193001624 .

[brauer-2] Georg Brauer (Ed.), With the collaboration of Marianne Baudler a . a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , p. 275.

[Sigma-3] Datasheet Cobalt (II) fluoride, powder from Sigma-Aldrich , accessed on January 16, 2012 ( PDF ).

[Sigma4-4] Data sheet Cobalt (II) fluoride tetrahydrate, 99.99% trace metals basis from Sigma-Aldrich , accessed on January 16, 2012 ( PDF ).

[webelements-5] Web elements: Cobalt difluoride

[6] RH Carter: Solubilities of Some Inorganic Flurides in Water at 25 ° C . In: Industrial & Engineering Chemistry . tape 20 , no. 11 , 1928, pp. 1195 , doi : 10.1021 / ie50227a024 .

[7] Entry on Cobaltous fluoride in the Hazardous Substances Data Bank , accessed July 27, 2012.

[Srivastava-8] AK Srivastava, PC Jain: Chemistry. 2008, ISBN 81-88597-83-X , p. 827 ( limited preview in Google Book Search).