Iron (II) fluoride
Crystal structure | ||||||||||
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__ Fe 2+ __ F - | ||||||||||
General | ||||||||||
Surname | Iron (II) fluoride | |||||||||
other names |
Iron difluoride |
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Ratio formula | FeF 2 | |||||||||
Brief description |
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properties | ||||||||||
Molar mass | 93.84 g mol −1 | |||||||||
Physical state |
firmly |
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density |
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Melting point |
1100 ° C (sublimation) |
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solubility |
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safety instructions | ||||||||||
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As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . |
Iron (II) fluoride is a chemical compound from the groups of iron compounds and fluorides .
Extraction and presentation
Iron (II) fluoride can be obtained by reacting iron (II) chloride with hydrogen fluoride .
The product made in this way is amorphous. To get it crystalline, it has to be heated to 1000 ° C. In addition, pure white iron (II) fluoride is only obtained if the work is carried out completely without water . Otherwise the compound will turn gray-brown during the recrystallization process.
properties
In its pure state, iron (II) fluoride is a white solid that is sparingly soluble in water. It has a crystal structure of rutile type, space group P 4 2 / mnm (space group no. 136) , lattice parameter a = 4.695 Å , c = 3.310 Å.
use
Iron (II) fluoride is used as a starting material for the production of other iron (II) compounds. It is also used in organic chemistry as a catalyst for fluorination .
Individual evidence
- ↑ a b c d David R. Lide (Ed.): CRC Handbook of Chemistry and Physics . 90th edition. CRC Press, 2009, ISBN 978-1-4200-9084-0 .
- ↑ a b c d e f Entry on iron (II) fluoride in the GESTIS substance database of the IFA , accessed on January 10, 2017(JavaScript required) .
- ↑ a b c d e f 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.
- ^ WH Baur, AA Khan: Rutile-type compounds. IV. SiO 2 , GeO 2 and a comparison with other rutile-type structures. In: Acta Crystallographica , B27, 1971, pp. 2133-2139, doi: 10.1107 / S0567740871005466 .
- ^ Catherine E. Housecroft, AG Sharpe: Inorganic chemistry. Prentice Hall, 2004, ISBN 978-0130399137 ( limited preview in Google Book Search).
- ↑ Egon Wildermuth, Hans Stark, Gabriele Friedrich, Franz Ludwig Ebenhöch, Brigitte Kühborth, Jack Silver, Rafael Rituper: Iron Compounds . In: Ullmann's Encyclopedia of Industrial Chemistry . 2000, doi : 10.1002 / 14356007.a14_591 .