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Scandium is a chemical element with the symbol Sc and atomic number 21. It is a silvery-white metallic d-block element. Historically, it has been classified as a rare-earth element, [9] together with yttrium and the lanthanides. It was discovered in 1879 by spectral analysis of the minerals euxenite and gadolinite from Scandinavia. [10]
The reaction of scandium trichloride with two equivalents of sodium cyclopentadienide (NaCp) produces the chloride-bridged dimer: 2 ScCl 3 + 4 NaCp → [Cp 2 Sc(μ-Cl)] 2 + 4 NaCl. Cp 3 Sc is a polymer wherein one third of the Cp ligands serving as bridging ligands. [5] Bulkier cyclopentadienide ligands give monoscandium derivatives, e.g. (C 5 ...
In all four halides, the scandium is 6-coordinated. They can be prepared by reacting scandium oxide or scandium hydroxide with the corresponding acid: [3] Sc(OH) 3 + 3 HX → ScX 3 + 3 H 2 O. The halides are Lewis acids; for example, ScF 3 dissolves in a solution containing excess fluoride ion to form [ScF 6] 3−. The coordination number 6 is ...
Scandium acetate is a compound, with the chemical formula of Sc(CH 3 COO) 3. It exists in the anhydrous and the hydrate forms. It can be obtained by reacting scandium hydroxide or scandium oxide with acetic acid. [1] [2] It is a colorless, water-soluble solid. It decomposes into scandium oxide at high temperature.
Naturally occurring scandium (21 Sc) is composed of one stable isotope, 45 Sc. Twenty-seven radioisotopes have been characterized, with the most stable being 46 Sc with a half-life of 83.8 days, 47 Sc with a half-life of 3.35 days, and 48 Sc with a half-life of 43.7 hours and 44 Sc with a half-life of 3.97 hours.
Download QR code; Print/export Download as PDF; Printable version; In other projects ... Scandium phosphide is an inorganic compound of scandium and phosphorus with ...
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Aluminium–scandium alloys (AlSc) are aluminum alloys that consist largely of aluminium (Al) and traces of scandium (Sc) as the main alloying elements.In principle, aluminium alloys strengthened with additions of scandium are very similar to traditional nickel-base superalloys in that both are strengthened by coherent, coarsening resistant precipitates with an ordered L1 2 structure.