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Scandium(III) hydroxide is an inorganic compound with the chemical formula Sc(OH) 3, the trivalent hydroxide of scandium. It is an amphoteric compound. [2] It is slightly soluble in water, and its saturated solution (pH = 7.85) contains Sc(OH) 3 and a small amount of Sc(OH) + 2. The solubility of scandium(III) hydroxide in water is 0.0279 mol/L.
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 ...
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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.
The addition of scandium to aluminium limits the grain growth in the heat zone of welded aluminium components. This has two beneficial effects: the precipitated Al 3 Sc forms smaller crystals than in other aluminium alloys, [54] and the volume of precipitate-free zones at the grain boundaries of age-hardening aluminium alloys is reduced. [54]
Scandium(III) oxide or scandia is a inorganic compound with formula Sc 2 O 3.It is one of several oxides of rare earth elements with a high melting point.It is used in the preparation of other scandium compounds as well as in high-temperature systems (for its resistance to heat and thermal shock), electronic ceramics, and glass composition (as a helper material).