Element Story - Thulium

Thulium is an element with atomic number 69, belonging to the lanthanide series of rare-earth metals. It is a silvery-white, relatively soft, and ductile metal that slowly oxidizes in air. Among the rare-earth elements, it is found in very small quantities in nature, occurring alongside other rare-earth elements in minerals like monazite. Thulium is used as a material for infrared lasers and specialized optical equipment, and thulium-doped lasers are utilized in medical surgical equipment and material processing. The radioactive isotope Thulium-170 emits beta and gamma rays, and has been used as a portable radiation source and in medical research. Furthermore, Thulium-169's neutron-absorbing properties make it useful in nuclear reactor-related research. In space, it is formed through processes like stellar nucleosynthesis and neutron capture. Analyzing the abundance of rare-earth elements like thulium helps in studying the nuclear reactions within stars and the formation processes of heavy elements. Thulium, being a rare element, is particularly valuable data for researching stellar chemical evolution.