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 kanye ne-lanthanide zihlangana ngokuseduze kuma-ore ayinkimbinkimbi kakhulu endaweni...
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