1843年，瑞士化学家C.G.莫桑德尔把硅铍钇矿分解为稀土材料氧化钇、氧化铒和氧化铽。
In 1843 , a Swedish chemist named Carl Gustaf Mosander took gadolinite and separated it into the rare-Earth materials yttria , erbia , and terbia .
莫桑德尔