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Cerium: Cerium (Ce), chemical element, the most abundant of the rare-earth metals. Commercial-grade cerium is iron-gray in colour, silvery when in a pure form, and ...

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Rare Earth Elements (REE) ... The International Union of Pure and Applied Chemistry includes scandium in their rare earth element definition.

How Are Rare Earths Used? There are 17 elements found on the earth that are classified as rare earth elements (REE). While the word "rare…

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