Iron (II, III) fluoride

General
Surname	Iron (II, III) fluoride
Molecular formula	Fe 2 F 5
Brief description	steel blue or gray solid
External identifiers / databases
Wikidata	Q15632763
properties
Molar mass	206.68 g mol −1
Physical state	firmly
density	3.34 g cm −3 ; 2.43 g cm −3 (trihydrate); 2.2 g cm −3 (heptahydrate);
safety instructions
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 .

Iron (II, III) fluoride is an inorganic chemical compound of iron from the group of fluorides .

Extraction and presentation

Iron (II, III) fluoride can be obtained by reacting iron with boiling hydrofluoric acid . The resulting hydrates can be converted into the anhydrate at 180 ° C.

properties

Iron (II, III) fluoride is a solid in the form of dark steel-blue to gray flakes. It is very hygroscopic and quickly changes into the deep red trihydrate in moist air. The yellow heptahydrate, which is sparingly soluble in water, forms with excess water. Newer sources identify the red form as dihydrate. This has an orthorhombic crystal structure with the space group Imma (space group no. 74) . Template: room group / 74

Individual evidence

↑ ^a ^b ^c ^d ^e ^f ^g Georg Brauer (Ed.), With the collaboration of Marianne Baudler u. a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , p. 274.
↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
^ Ronald Rich: Inorganic Reactions in Water . Springer, 2007, ISBN 3-540-73962-9 , pp. 182 ( limited preview in Google Book search).
^ Dominic PE Dickson, Frank J. Berry: Mössbauer Spectroscopy . Cambridge University Press, 2005, ISBN 0-521-01810-2 , pp. 128 ( limited preview in Google Book search).
^ W. Hall, S. Kim, J. Zubieta, EG Walton, DB Brown, VERMONT UNIV BURLINGTON DEPT OF CHEMISTRY .: The Structure of a Mixed-Valence Iron Fluoride, Fe2F5.2H2O. 1977.

[brauer-1] ↑ ^a ^b ^c ^d ^e ^f ^g Georg Brauer (Ed.), With the collaboration of Marianne Baudler u. a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , p. 274.

[NV-2] This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.

[Ronald_Rich-3] Ronald Rich: Inorganic Reactions in Water . Springer, 2007, ISBN 3-540-73962-9 , pp. 182 ( limited preview in Google Book search).

[Dominic_P._E._Dickson,_Frank_J._Berry-4] Dominic PE Dickson, Frank J. Berry: Mössbauer Spectroscopy . Cambridge University Press, 2005, ISBN 0-521-01810-2 , pp. 128 ( limited preview in Google Book search).

[W._Hall,_S._Kim,_J._Zubieta,_E._G._Walton,_D._B._Brown,_VERMONT_UNIV_BURLINGTON_DEPT_OF_CHEMISTRY.-5] W. Hall, S. Kim, J. Zubieta, EG Walton, DB Brown, VERMONT UNIV BURLINGTON DEPT OF CHEMISTRY .: The Structure of a Mixed-Valence Iron Fluoride, Fe2F5.2H2O. 1977.