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Names | |
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IUPAC name tripotassium;hexafluoroaluminum(3-) | |
Identifiers | |
3D model (JSmol) | |
ChemSpider | |
ECHA InfoCard | 100.033.994 |
EC Number |
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PubChem CID | |
CompTox Dashboard (EPA) | |
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Properties | |
K3AlF6 | |
Appearance | powder |
Melting point | 1035 |
slightly soluble | |
Hazards | |
GHS labelling: | |
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Warning | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). |
Potassium hexafluoroaluminate is an inorganic chemical compound with the chemical formula K3AlF6. [1] [2] [3] It naturally occures as the mineral cryolite. [4]
Potassium hexafluoroaluminate can be obtained by reacting fluoroaluminic acid (obtained by the reaction of anhydrous hydrogen fluoride and aluminum hydroxide) with potassium hydroxide at high temperature, followed by filtering, drying, melting, and crushing.
Potassium hexafluoroaluminate appears as a white to light grey powder, and is slightly soluble in water.
It forms colorless crystals of the tetragonal system, space group I41/a. [5]
Potassium hexafluoroaluminate is used as a welding agent. [6]
It is also used in the production of pesticides, manufacture of glassware and enamel industry, in addition to being a solvent for the bauxite in the electrical manufacture of aluminum.
Sodium hydroxide, also known as lye and caustic soda, is an inorganic compound with the formula NaOH. It is a white solid ionic compound consisting of sodium cations Na+ and hydroxide anions OH−.
The Hall–Héroult process is the major industrial process for smelting aluminium. It involves dissolving aluminium oxide (alumina) in molten cryolite and electrolyzing the molten salt bath, typically in a purpose-built cell. The Hall–Héroult process applied at industrial scale happens at 940–980 °C and produces 99.5–99.8% pure aluminium. Recycling aluminum requires no electrolysis, thus it is not treated in this way.
Potassium hydroxide is an inorganic compound with the formula KOH, and is commonly called caustic potash.
In chemistry, an aluminate is a compound containing an oxyanion of aluminium, such as sodium aluminate. In the naming of inorganic compounds, it is a suffix that indicates a polyatomic anion with a central aluminium atom.
Iron(III) fluoride, also known as ferric fluoride, are inorganic compounds with the formula FeF3(H2O)x where x = 0 or 3. They are mainly of interest by researchers, unlike the related iron(III) chloride. Anhydrous iron(III) fluoride is white, whereas the hydrated forms are light pink.
Hexafluorosilicic acid is an inorganic compound with the chemical formula H
2SiF
6. Aqueous solutions of hexafluorosilicic acid consist of salts of the cation and hexafluorosilicate anion. These salts and their aqueous solutions are colorless.
Sodium hydrosulfide is the chemical compound with the formula NaSH. This compound is the product of the half-neutralization of hydrogen sulfide with sodium hydroxide (NaOH). NaSH and sodium sulfide are used industrially, often for similar purposes. Solid NaSH is colorless. The solid has an odor of H2S owing to hydrolysis by atmospheric moisture. In contrast with sodium sulfide, which is insoluble in organic solvents, NaSH, being a 1:1 electrolyte, is more soluble.
Aluminium fluoride is an inorganic compound with the formula AlF3. It forms hydrates AlF3·xH2O. Anhydrous AlF3 and its hydrates are all colorless solids. Anhydrous AlF3 is used in the production of aluminium. Several occur as minerals.
Yttrium(III) fluoride is an inorganic chemical compound with the chemical formula Y F3. It is not known naturally in 'pure' form. The fluoride minerals containing essential yttrium include tveitite-(Y) (Y,Na)6Ca6Ca6F42 and gagarinite-(Y) NaCaY(F,Cl)6. Sometimes mineral fluorite contains admixtures of yttrium.
Sodium hexafluoroaluminate is an inorganic compound with formula Na3AlF6. This white solid, discovered in 1799 by Peder Christian Abildgaard (1740–1801), occurs naturally as the mineral cryolite and is used extensively in the industrial production of aluminium. The compound is the sodium (Na+) salt of the hexafluoroaluminate (AlF63−) ion.
Arsenic trifluoride is a chemical compound of arsenic and fluorine with the chemical formula AsF3. It is a colorless liquid which reacts readily with water.
Dinitrogen difluoride is a chemical compound with the formula N2F2. It is a gas at room temperature, and was first identified in 1952 as the thermal decomposition product of the fluorine azide. It has the structure F−N=N−F and exists in both cis and trans isomers, as typical for diimides.
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. It has also been used as a precursor to zeolites.
Actinium(III) fluoride (AcF3) is an inorganic compound, a salt of actinium and fluorine.
Americium(III) hydroxide is a radioactive inorganic compound with the chemical formula Am(OH)3. It consists of one americium atom and three hydroxy groups. It was first discovered in 1944, closely related to the Manhattan Project. However, these results were confidential and were only released to the public in 1945. It was the first isolated sample of an americium compound, and the first americium compound discovered.
Americium compounds are compounds containing the element americium (Am). These compounds can form in the +2, +3, and +4, although the +3 oxidation state is the most common. The +5, +6 and +7 oxidation states have also been reported.
Potassium hexafluorotitanate is an inorganic compound of potassium, fluorine, and titanium with the chemical formula K2TiF6.
Potassium hexafluoroantimonate is an inorganic chemical compound with the chemical formula KSbF6.
Lithium hexafluoroaluminate is an inorganic chemical compound with the chemical formula Li3AlF6.