I-Thulium, ingxenye 69 yethebula le-periodic. I-Thulium, i-elementi enokuqukethwe okuncane kakhulu kwezinto ezingavamile zomhlaba, ikakhulukazi ihlangana nezinye izakhi ku-Gadolinite, i-Xenotime, i-ore yegolide engavamile emnyama ne-monazite. Izakhi zensimbi ze-Thulium ne-lanthanide zihlangana ngokusondelene kuma-ore ayinkimbinkimbi kakhulu endaweni...
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