Thulium, element 69 ntawm lub sijhawm teem sijhawm. Thulium, lub caij nrog cov ntsiab lus tsawg tshaj plaws ntawm lub ntiaj teb tsis tshua muaj, feem ntau yog coexist nrog lwm cov ntsiab lus hauv Gadolinite, Xenotime, dub tsawg kub ore thiab monazite. Thulium thiab lanthanide hlau ntsiab lus coexist nyob rau hauv tsis tshua muaj complex ores nyob rau hauv nat ...
Nyeem ntxiv