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'''Ammonium hexafluoroaluminate''' is an [[inorganic compound]] with the [[chemical formula]] of (NH<sub>4</sub>)<sub>3</sub>[AlF<sub>6</sub>]. It is a white solid. Upon heating, it converts to [[aluminium trifluoride]], a reaction that releases [[hydrogen fluoride]].<ref>{{cite journal |doi=10.1021/cm991195g|title=Preparation and Characterization of Different Phases of Aluminum Trifluoride|year=2000|last1=Alonso|first1 =C.|last2=Morato|first2=A.|last3=Medina|first3=F.|last4=Guirado|first4=F. |last5=Cesteros|first5=Y.|last6=Salagre|first6=P.|last7=Sueiras|first7=J. E.|last8=Terrado|first8=R.|last9=Giralt|first9=A.|journal= Chemistry of Materials|volume=12|issue=4|pages=1148–1155}}</ref> It has also been used as a precursor to [[zeolite]]s.<ref>{{cite journal |doi=10.1016/j.molcata.2005.03.026|title=Post-synthesis alumination of mesoporous silica SBA-15 with high framework aluminum content using ammonium hexafluoroaluminate|year=2005|last1=Kao|first1=Hsien-Ming|last2=Ting|first2=Chun-Chiang|last3=Chao|first3=Shih-Wei|journal=Journal of Molecular Catalysis A: Chemical|volume=235|issue=1–2|pages=200–208}}</ref> |
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'''Ammonium hexafluoroaluminate''' is an [[inorganic compound]] with the [[chemical formula]] of (NH<sub>4</sub>)<sub>3</sub>[AlF<sub>6</sub>]. It is a white solid. Upon heating it releases [[Corrosive substance|corrosive]] [[hydrogen fluoride]]. |
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==Preparation== |
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Ammonium hexafluoroaluminate can be obtained by the reaction of [[ammonium fluoride]] and [[aluminium hydroxide]].<ref name="brauer">{{cite book | author=hrsg. von Georg Brauer. Unter Mitarb. von M. Baudler | title=Handbuch der präparativen anorganischen Chemie / 1. | publisher=Enke | publication-place=Stuttgart | date=1975 | isbn=3-432-02328-6 | oclc=310719485 | language=de|page=239}}</ref> |
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:<math>\mathrm{6 \ NH_4F + Al(OH)_3 \longrightarrow (NH_4)_3[AlF_6] + 3 \ NH_4OH}</math> |
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==References== |
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<references /> |
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{{Ammonium salts}} |
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[[Category:Aluminium complexes]] |
[[Category:Aluminium complexes]] |
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[[Category:Fluoro complexes]] |
[[Category:Fluoro complexes]] |
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[[Category:Ammonium compounds]] |
[[Category:Ammonium compounds]] |
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[[Category:Fluorometallates]] |
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{{inorganic-compound-stub}} |
{{inorganic-compound-stub}} |
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Latest revision as of 03:03, 21 December 2022
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| Names | |
|---|---|
| Other names
Ammonium aluminium fluoride
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| Identifiers | |
3D model (JSmol)
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| ChemSpider | |
| ECHA InfoCard | 100.029.138 |
| EC Number |
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PubChem CID
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| UNII | |
CompTox Dashboard (EPA)
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| Properties | |
| (NH4)3[AlF6] | |
| Molar mass | 195.09 g/mol |
| Appearance | White crystalline powder |
| Density | 1.78 g/cm3 at 20 °C |
| Melting point | 126.1 °C (259.0 °F; 399.2 K) |
| Boiling point | 239.5 °C (463.1 °F; 512.6 K) |
| Hazards | |
| Occupational safety and health (OHS/OSH): | |
Main hazards
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Irritant (Xi) |
| GHS labelling: | |
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| Danger | |
| H301, H311, H330, H331 | |
| P260, P261, P264, P270, P271, P280, P284, P301+P310, P302+P352, P304+P340, P310, P311, P312, P320, P321, P322, P330, P361, P363, P403+P233, P405, P501 | |
| NFPA 704 (fire diamond) | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Ammonium hexafluoroaluminate is an inorganic compound with the chemical formula of (NH4)3[AlF6]. It is a white solid. Upon heating, it converts to aluminium trifluoride, a reaction that releases hydrogen fluoride.[1] It has also been used as a precursor to zeolites.[2]
Preparation[edit]
Ammonium hexafluoroaluminate can be obtained by the reaction of ammonium fluoride and aluminium hydroxide.[3]
![{\displaystyle \mathrm {6\ NH_{4}F+Al(OH)_{3}\longrightarrow (NH_{4})_{3}[AlF_{6}]+3\ NH_{4}OH} }](https://wikimedia.org/api/rest_v1/media/math/render/svg/3a8bc07d0a5a46dc2ccb13d129f84fb5279c14fc)
References[edit]
- ^ Alonso, C.; Morato, A.; Medina, F.; Guirado, F.; Cesteros, Y.; Salagre, P.; Sueiras, J. E.; Terrado, R.; Giralt, A. (2000). "Preparation and Characterization of Different Phases of Aluminum Trifluoride". Chemistry of Materials. 12 (4): 1148–1155. doi:10.1021/cm991195g.
- ^ Kao, Hsien-Ming; Ting, Chun-Chiang; Chao, Shih-Wei (2005). "Post-synthesis alumination of mesoporous silica SBA-15 with high framework aluminum content using ammonium hexafluoroaluminate". Journal of Molecular Catalysis A: Chemical. 235 (1–2): 200–208. doi:10.1016/j.molcata.2005.03.026.
- ^ hrsg. von Georg Brauer. Unter Mitarb. von M. Baudler (1975). Handbuch der präparativen anorganischen Chemie / 1 (in German). Stuttgart: Enke. p. 239. ISBN 3-432-02328-6. OCLC 310719485.