Germanium (IV) fluoride
Structural formula | |||||||||||||||||||
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General | |||||||||||||||||||
Surname | Germanium (IV) fluoride | ||||||||||||||||||
other names |
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Molecular formula | GeF 4 | ||||||||||||||||||
Brief description |
colorless gas with a garlic-like odor |
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properties | |||||||||||||||||||
Molar mass | 148.58 g mol −1 | ||||||||||||||||||
Physical state |
gaseous |
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density |
2.16 g cm −3 (at 0 ° C) |
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Sublimation point |
−36.5 ° C |
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Vapor pressure |
404 k Pa (−16 ° C) |
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solubility |
Decomposes in water |
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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 . |
Germanium (IV) fluoride is a chemical compound from the group of germanium compounds and fluorides .
Extraction and presentation
Germanium (IV) fluoride can be produced by reacting germanium with fluorine or hydrogen fluoride .
It is also formed during thermal decomposition (700 ° C) of the complex salt Ba [GeF6], which can be obtained by precipitating a solution of germanium dioxide in hydrofluoric acid with barium chloride .
properties
Germanium (IV) fluoride is a non-flammable gas that smokes heavily in air and has a garlic-like odor. It forms corrosive acids with water (hydrolysis to GeO 2 and H 2 GeF 6 ) and can react violently with these. Above 1000 ° C, it decomposes in moist air, producing hydrogen fluoride, fluorine and germanium dioxide . It crystallizes out as a trihydrate from aqueous solutions.
use
Germanium (IV) fluoride is used in combination with disilane to produce SiGe crystals.
Web links
- RL Benoit, J. Place: Fluoride complexes of germanium (IV) in aqueous solution . In: Canadian Journal of Chemistry . 41 (5), 1963, pp. 1170-1180, doi : 10.1139 / v63-165 .
Individual evidence
- ↑ a b c d e f g Entry on germanium tetrafluoride in the GESTIS substance database of the IFA , accessed on February 1, 2016(JavaScript required) .
- ↑ a b Germanium (IV) fluoride data sheet from Sigma-Aldrich , accessed on April 3, 2011 ( PDF ).
- ↑ a b c 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. 230.
- ↑ Wolfgang Legrum: Fragrances, between stink and fragrance , Vieweg + Teubner Verlag (2011) pp. 68–69, ISBN 978-3-8348-1245-2 .
- ^ AF Holleman , E. Wiberg , N. Wiberg : Textbook of Inorganic Chemistry . 91st – 100th, improved and greatly expanded edition. Walter de Gruyter, Berlin 1985, ISBN 3-11-007511-3 , p. 791.