yt.tri.um
n.Symbol Y （名词）符号 Y A silvery metallic element, not a rare earth but occurring in nearly all rare-earth minerals, used in various metallurgical applications, notably to increase the strength of magnesium and aluminum alloys. Atomic number 39; atomic weight 88.905; melting point ,522=C; boiling point 3,338=C; specific gravity 4.45 (25=C); valence 3.See table at element 钇：一种银色金属元素，不是稀土但几乎存在于所有的稀土物质中，用于各种冶金的运用中，可显著提高镁铝合金的强度。原子序数39；原子量88.905；熔点,522=C；沸点3,338=C；比重4.45（在25=C时）；化合价3参见 element
来源：From yttria 源自 yttria
【引伸】
yt.tric
