Compounds
See also categories: Scandium compounds and Scandium mineralsThe chemistry is almost completely dominated by the trivalent ion, Sc3+. The radii of M3+ ions in the table below indicate that in terms of chemical properties, scandium ions are more similar to those of yttrium than to those of aluminium. In part for this similarity, scandium is often classified as a lanthanide-like element.
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Ionic radii (pm) Al Sc Y La Lu 53.5 74.5 90.0 103.2 86.1
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