“稀土”一词由来于拉丁文,十八世纪时称不溶于水的固体氧化物为“土”,当时认为这种物质稀少,今天看来,稀土并不稀少,在地壳中有很高的克拉克值,它只是分散而已,正是由于其分散在任何地质体中,这恰恰成了利用它来研究矿物成因的有利指 The term “rare earths” originated in Latin. In the 18th century, water-insoluble solid oxides were termed “earths,” which at that time were considered sparse. It seems rare today that rare earths are rare and have high Clarke value, it is only scattered, it is because of its dispersion in any geological body, which has just become the use of it to study the causes of mineral generous means