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Glossary

The Kallanish Glossary aims to be a useful resource for complex industry specific terminology. We are constantly adding to our glossary, so if you have a suggestion or amendment please do get in touch.

Rare earth elements (REE)

Power Materials

The rare-earth elements (REE), also called the rare-earth metals are a set of 17 nearly-indistinguishable lustrous silvery-white soft heavy metals. Despite their name, rare-earth elements are relatively plentiful in Earth's crust, with cerium being the 25th most abundant element at 68 parts per million, more abundant than copper. The largest market for rare earths are for magnets, mostly using the so-called “technology metals,” which are used in everything from electric motors to lasers to cancer treatment to nuclear reactors to commercial lighting.

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