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绪言要探索和研究各种稀土金属的性质及其一切有关性质的精确数据,如电导系数,导热系数、磁感系数、蒸气压力、以及热力学上等等的数据,必需先要制备纯粹的稀土金属。由于这些稀土金属的电子结构都很类似,并且在周期表中又占有同一位置,故他们的性质都很相似,化学上把它们当作一族——稀土金属族——来研究。它们各元素之间主要不同之点,仅是在于其原子半径不同,因此之故,这些稀土金属及其盐类彼此都很难分离,只能利用它们盐类彼此间溶解度稍为不同,经过很长一连串分批结晶或沉淀等步骤,才能将它们分离开来,然后再在一个封闭的密器中提炼稀土金属。故假使参与反应的原料中混有杂质,就会影响产生出来金属的纯度。
INTRODUCTION To explore and study the precise nature of various rare earth metals and their associated properties such as conductivity, thermal conductivity, magnetic susceptibility, vapor pressure, and thermodynamic data, you must first prepare pure rare earth metals . Since the electronic structures of these rare earth metals are very similar and occupy the same place in the periodic table, they all behave in a similar way and are studied chemically as a family of rare earth metals. The main difference between the elements is that they have different atomic radii. Therefore, these rare earth metals and their salts are hard to be separated from each other, and only their solubility in salt is slightly different from each other. After a long A series of steps such as batch crystallization or precipitation can separate them and then refine the rare earth metals in a closed densifier. Therefore, if the raw materials involved in the reaction mixed with impurities, it will affect the purity of the metal produced.