The following uses for scandium are gathered from a number of sources as well as from anecdotal comments. I'd be delighted to receive corrections as well as additional referenced uses (please use the feedback mechanism to add uses).
- isotope tracing in crude oil analysis
- the iodide added to mercury vapour lamps and produces a highly efficient light source resembling sunlight, which is important for indoor or night-time colour TV transmission.
- apparently scandium is a component of alloys used to make metallic baseball bats (mercifully metallic cricket bats were banned after Dennis Lillee tried to use one)