Germanium (II) fluoride
| Crystal structure | ||||||||||
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| __ Ge 2+ __ F - | ||||||||||
| Crystal system |
orthorhombic |
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| Space group |
P 2 1 2 1 2 1 (No. 19) |
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| Lattice parameters |
a = 4.682 Å , b = 5.178 Å, c = 8.312 Å |
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| General | ||||||||||
| Surname | Germanium (II) fluoride | |||||||||
| other names |
Germanium difluoride |
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| Ratio formula | GeF 2 | |||||||||
| Brief description |
white solid |
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| External identifiers / databases | ||||||||||
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| properties | ||||||||||
| Molar mass | 110.64 g mol −1 | |||||||||
| Physical state |
firmly |
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| Melting point |
110 ° C |
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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 (II) fluoride is an inorganic chemical compound of germanium from the group of fluorides .
Extraction and presentation
Germanium (II) fluoride can be obtained by reacting germanium (IV) fluoride with germanium at 150 ° C.
properties
Germanium (II) fluoride is a white solid that is soluble in 48% hydrofluoric acid . It can be distilled at 130 ° C in vacuo and decomposes above 160 ° C with discoloration. It has strong reducing properties. Conversion to germanium (II) hydroxide takes place in moist air . Germanium (II) fluoride has an orthorhombic crystal structure with the space group P 2 1 2 1 2 1 (space group number 19) and the lattice constants a = 0.4682 nm, b = 0.5178 nm, c = 0.8312 nm as well as four formula units per unit cell . Its crystal structure consists of strong polymer chains made up of GeF 3 pyramids , with one of the fluorine atoms in the chain belonging to two adjacent pyramids.
Individual evidence
- ↑ a b c d e 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. 230.
- ↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
- ^ Dale L. Perry: Handbook of Inorganic Compounds, Second Edition . Taylor & Francis US, 2011, ISBN 1-4398-1462-7 , pp. 187 ( limited preview in Google Book search).
- ↑ James Trotter, M. Akhtar, Neil Bartlett: The crystal structure of germanium difluoride. In: Journal of the Chemical Society A: Inorganic, Physical, Theoretical. 1966, p. 30, doi : 10.1039 / J19660000030 .