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Aluminium sulfide is a chemical compound with the formula Al 2 S 3. This colorless species has an interesting structural chemistry, existing in several forms. The material is sensitive to moisture, hydrolyzing to hydrated aluminium oxides/hydroxides. [1] This can begin when the sulfide is exposed to the atmosphere.
The only stable chalcogenides under normal conditions are aluminium sulfide (Al 2 S 3), selenide (Al 2 Se 3), and telluride (Al 2 Te 3). All three are prepared by direct reaction of their elements at about 1,000 °C (1,832 °F) and quickly hydrolyse completely in water to yield aluminium hydroxide and the respective hydrogen chalcogenide .
aluminium arsenide: 22831–42–1 AlB 2: aluminium diboride: 12041–50–8 AlB 12: aluminium dodecaboride: 12041–54–2 AlBr 3: aluminium bromide: 7727–15–3 AlBr 3 •6H 2 O: aluminium bromide hexahydrate: 7784–11–4 Al(CHO 2) 3: aluminium formate: 7360–53–4 AlCl 3: aluminium chloride: 7446–70–0 AlCl 3 •6H 2 O: aluminium ...
22395-91-1 AlCl 2<F: aluminium chloride fluoride: 22395-91-1 AlClO: aluminium chloride oxide: 13596-11-7 AlCl 2 H: dichloroalumane: 16603-84-2 AlCl 3: aluminium chloride: 16603-84-2 AlCl 2 F: aluminium chloride fluoride: 13497-96-6 AlCl 3: aluminium trichloride: 7446-70-0 AlCl 4 Cs: aluminium caesium tetrachloride: 17992-03-9 AlCl 4 K ...
As aluminium is a small atom relative to these chalcogens, these have four-coordinate tetrahedral aluminium with various polymorphs having structures related to wurtzite, with two-thirds of the possible metal sites occupied either in an orderly (α) or random (β) fashion; the sulfide also has a γ form related to γ-alumina, and an unusual ...
Ammonium aluminium sulfate, also known as ammonium alum or just alum (though there are many different substances also called "alum"), is a white crystalline double sulfate usually encountered as the dodecahydrate, formula (NH 4)Al(SO 4) 2 ·12H 2 O. It is used in small amounts in a variety of niche applications.
Aluminium sulfate is a salt with the formula Al 2 (SO 4) 3. It is soluble in water and is mainly used as a coagulating agent (promoting particle collision by neutralizing charge) in the purification of drinking water [ 3 ] [ 4 ] and wastewater treatment plants , and also in paper manufacturing.
Aluminides are intermetallic compounds of aluminium. [1] Since aluminium is near the nonmetals on the periodic table, it can bond with metals differently than other metals. The properties of an aluminide are between those of a metal alloy and those of an ionic compound. Aluminides are used as bond coats in thermal barrier coating systems. [2]