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scandium iodide is an inorganic compound with the chemical formula ScI3 and is classified as a rare earth iodide. This yellow powder is soluble in water and acid and is highly reactive, so it must be stored under an inert gas to prevent contamination. It also absorbs moisture easily, so it must be kept in an airtight container.
ScI3 is produced industrially by the reduction of scandium oxide, usually in the form of thortveitite (Sc,Y)2(SiO7). The reduced material can be dehydrated to anhydrous scandium triiodide by heating in excess aqueous HCl. The anhydrous material can then be purified by sublimation.
The rare metal scandium is present in nature combined in minute amounts with over 800 minerals. The most concentrated sources are the minerals euxenite, gadolinite and thortveitite found in Scandinavia and Madagascar. The element can be extracted from these sources, but it is very expensive and supplies are limited. Metallic scandium is rarely used outside of aerospace industries, where it is substituted for aluminium in aircraft components and sports equipment such as baseball bats and fishing rods. Very dilute scandium sulfate is also used to improve the germination of certain crops.
American Elements manufactures scandium iodide to many standard grades when applicable, including Mil Spec (military grade), ACS, Reagent and Technical Grade, Food, Agricultural and Pharmaceutical Grade, Optical Grade and USP/BP (British Pharmacopoeia/European Pharmacopoeia) and follows applicable ASTM testing standards. It is shipped in its pure form or as a component of other products.