释义 |
镧lán金属元素,符号La(lanthanum)。是一种稀土金属。银白色,质软,在空气中容易氧化。用于制备钐、铕和镱,镧的化合物用来制光学玻璃等。{Lanthanum(La), a soft, oxidizable, silvery-white rare earth metal that is used in the manufacture of alloys or catalysts with samarium, europium, ytterbium and lanthanum for the making of optical glass} |