稀土元素指的是镧系元素和钪、钇共17个元素。稀土元素的化学性质相近而又不完全相同,其共同的特征表现为具有很强的电负性,+3价、+4价离子较为稳定。我国拥有丰富的稀土资源,所探明的稀土资源储量占世界总储量43%,是名副其实的世界第一稀土资源大国。我国稀土资源具有储量大、分布广和品 Rare earth elements refers to the lanthanide and scandium, yttrium a total of 17 elements. The chemical properties of rare earth elements are similar but not completely the same. Their common feature is that they have strong electronegativity, +3 valences and +4 valence ions are relatively stable. China has rich rare earth resources, proven reserves of rare earth resources account for 43% of the world total reserves, is a veritable world’s largest rare earth resource country. China’s rare earth resources have a large reserves, wide distribution and products