Rare earth elements are lanthanum (La), cerium (Ce), praseodymium (Pr), neodymium (Nd), promethium (Pm), samarium (Sm), europium (Eu), gadolinium (Gd), terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thum (Tm), ytterbium (Yb), lutetium (Lu). And two elements closely related to the lanthanide 15 elements - scandium (Sc) and yttrium (Y) a total of 17 elements, known as rare earth elements. Rare earths for short.
Rare earth elements are also known as rare earth metals. Rare earth metals have been widely used in electronics, petrochemical, metallurgy, machinery, energy, light industry, environmental protection, agriculture and other fields.
distribution
Rare earth elements are not rare in the earth's crust, but they are distributed very unevenly, mainly in China, the United States, India, Russia, South Africa, Australia, Canada, Egypt and a few other countries. China has the largest rare earth reserves in the world, with major rare earth deposits such as Bayan Obo, Weishan and Mianning in Shandong province.
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