Scandium is present in maist o the deposits o rare yird an uranium compoonds, but it is extractit frae thir ores in anly a few mines warldwide. Acause o the law availability an the difficulties in the preparation o metallic scandium, which wis first done in 1937, it teuk till the 1970s afore applications for scandium wur developed. The positive effects o scandium on aluminium alloys wur discovered in the 1970s, an its uise in sic alloys remains its anly major application. The global tred o the pure metal is aroond a hunder poonds a year on average.
The properties o scandium compoonds are intermediate atween those o aluminium an yttrium. A diagonal relationship exists atween the behaviour o magnesium an scandium, juist as thare is atween beryllium an aluminium. In the chemical compoonds o the elements shawn as group 3, abuin, the predominant oxidation state is +3.
↑Smith, R. E. (1973). "Diatomic Hydride and Deuteride Spectra of the Second Row Transition Metals". Proceedings of the Royal Society of London. Series A, Mathematical and Physical Sciences. 332 (1588): 113–127. Bibcode:1973RSPSA.332..113S. doi:10.1098/rspa.1973.0015.
↑Gray, Theodore (2012) The Elements, Black Dog & Leventhal Publishers, p. 57, ISBN 1579128955.