Thulium

Thulium is one of the least common Lanthanum elements, similar to other rare earth metals, with a bright silver luster, malleable, malleable, soft enough to be cut with a knife, and highly resistant to corrosion in dry air.In addition to surgical lasers, one of its isotopes is also used in the manufacture of portable X-ray machines. It has few applications other than lasers. Because of its high price, very little Thulium is used in experiments.