稀有金属是工业、国防、航天、原子能、尖端科学的重要材料。它在自然界中含量很少,分布稀散,难以提取。根据其共同点可分为五类:1.稀有轻金属;2.稀有高熔点金属;3.稀有分散金属;4.稀土金属;5.稀有放射性金属。名称稀有,但有一定的相对性。稀有金属并不全部稀少,有些金属在地壳中的含量比常用金属大得多,如钒、锂、铍的储量就比铅、锌、锡的储量高。1.稀有轻金属包括锂、铍、铯、铷等金属。 Rare metals are important materials for industry, defense, aerospace, atomic energy, and cutting-edge science. It is rare in nature, scattered scattered, it is difficult to extract. According to their commonalities can be divided into five categories: 1. Rare light metals; 2. Rare refractory metals; 3. Rare scattered metals; 4. Rare earth metals; 5. Rare radioactive metals. The name is rare, but it has some relativity. Rare metals are not all scarce. Some metals are much larger in the earth’s crust than common metals. For example, vanadium, lithium and beryllium have higher reserves than lead, zinc and tin. 1. Rare light metals include lithium, beryllium, cesium, rubidium and other metals.