There are currently 2 astronomical definitions for the tag 'rareearth'.
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rare earth
fundamentalchemicalelement
cerium, dysprosium, erbium, europium, gadolinium, holmium, lanthanum, lutetium, neodymium, praseodymium, samarium, scandium, terbium, thulium, ytterbium, yttrium
abundance, metalabundance, metalline
