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国外稀土矿探明的储量估计为4200万吨(按 REO 计),工业储量为701万吨,主要矿物为氟碳铈镧矿,独居石和磷钇矿。氟碳铈镧矿和独居石用于生产铈类轻稀土。磷钇矿是钇和重稀土的主要来源。从钛铀矿和铀生产的废料中也可以回收一部分钇和重稀土。
Proved reserves of rare earths abroad are estimated at 42 million tons (by REO) with an industrial reserve of 7.01 million tons. The main minerals are bastnasite, monazite and xenotime. Bastnasite and monazite are used to produce cerium-based light rare earths. Xenotime is a major source of yttrium and heavy rare earths. Some yttrium and heavy rare earths can also be recovered from the waste from titanium uranium and uranium production.