一、镝、铽元素及应用情况镝是氧化钬经过上千次重结晶得到的一种新的稀土元素,在地壳中的丰度为6ppm,在重稀土中含量仅低于钇,是比较富存的重稀土元素。铽,是重稀土中的一种稀有元素,在地壳中的丰度很低,仅为1.1ppm,在稀土元素中排列第14位,仅仅高于铥、镥和钷。镝和铽像其他稀土金属元素一样,具有较高的化学活泼性,能 First, the dysprosium, terbium and application of the situation Dysprosium holmium oxide after thousands of recrystallization obtained a new rare earth element in the earth’s crust abundance of 6ppm, content of heavy rare earth is only lower than yttrium is relatively rich Deposit of heavy rare earth elements. Terbium, a rare earth element in heavy rare earths, has a very low abundance in the earth’s crust of only 1.1 ppm, ranking 14th in rare earth elements, only above 铥, 镥 and 钷. Dysprosium and terbium, like other rare earth elements, have high chemical activity and energy