Is a rare earth lanthanides in the periodic table - lanthanum (La), cerium (Ce), praseodymium (Pr), neodymium (Nd), promethium (Pm), samarium (Sm), europium (Eu), gadolinium (Gd ), terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm), ytterbium (Yb), lutetium (Lu), and 15 is closely related to the lanthanide series of two The elements - é’ª (Sc) and é’‡ (Y) - are 17 elements called Rare Earth. Referred to as rare earth (RE or R).
Classification of rare earths
1) Light rare earth (also known as 铈 group): 镧, 铈, 镨, é’•, é’·, é’, é“•, é’†.
2) Heavy rare earth (also known as é’‡ group): 铽, é•, é’¬, é“’, é“¥, 镱, é•¥, é’ª, é’‡.
The difference between the 铈 group and the 钇 group is because the rare earth mixture obtained by separation of minerals is often named after the ratio of lanthanum or cerium.
Rare earth metals (rare earth metals), also known as a rare earth element, is a general term for a group â…¢B periodic table scandium, yttrium, lanthanides 17 elements, commonly represented by R or RE. Their names and chemical symbols are é’ª (Sc), é’‡ (Y), 镧 (La), 铈 (Ce), 镨 (Pr), é’• (Nd), é’· (Pm), é’ (Sm), é“• (Eu ), Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu. Their atomic numbers are 21 (Sc), 39 (Y), 57 (La) to 71 (Lu).
Rare earth ore
Rare earth metal
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