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稀土元素包括镧、钬、铈、钐、钇、镨、钕、铽、铕、钷、钆、铥、镝、镥、铒、镱、钪17个元素,这些元素具有独特的理化特性,广泛应用于农医、石油化工、轻工业、能源材料、玻璃陶瓷、超导材料、合金材料、电子器件以及发光材料等诸多领域。稀土元素属元素周期表中ⅢB族,为内过渡元素,按照稀土元素的电子层结构以及由此反应的理化特性上的某些差别,将除钪以外的16个元素分为两组,即:轻稀土元素
The rare earth elements include 17 elements of lanthanum, holmium, cerium, samarium, yttrium, praseodymium, neodymium, terbium, europium, gadolinium, gadolinium, dysprosium, gallium, erbium, ytterbium and scandium. These elements have unique physicochemical properties and are widely used In agriculture, petrochemicals, light industry, energy materials, glass ceramics, superconducting materials, alloy materials, electronic devices and light-emitting materials, and many other fields. REE is a group ⅢB of the periodic table of the elements, which is an internal transition element. According to the electronic structure of the REE and some differences in physical and chemical properties of the reaction, 16 elements other than scandium are divided into two groups: Light rare earth elements