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Minerals glossary

Light and heavy rare earths

Also called light rare earths, heavy rare earths, LREE, LREEs, HREE, HREEs, medium rare earths

Rare earths are grouped by atomic weight. Light ones, such as lanthanum, cerium, neodymium and praseodymium, are more abundant; heavy ones, such as dysprosium, terbium and yttrium, are scarcer and costlier.

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