| 单词 | 稀土 |
| 释义 | 〔samarium〕A silvery or pale gray metallic rare-earth element found in monazite and bastnaesite and used as a dopant for laser materials, in infrared absorbing glass, and as a neutron absorber in certain nuclear reactors. Atomic number 62; atomic weight 150.35; melting point 1,072°C; boiling point 1,791°C; specific gravity (approximately) 7.50; valence 2, 3. See table at element 钐：一种银色或灰色稀土金属元素，含于独居石和氟碳铈矿中，用于激光制品掺杂剂，红外线吸光玻璃，在一些核反应堆中作中子吸收剂。原子序数62；原子量150.35；熔点1,072°C；沸点1,791°C；比重约7.50；化合价2，3 参见 element〔gadolinite〕A dark green or greenish-black silicate mineral, Be2FeY 2Si 2O 10, containing several of the rare earths in combination with iron. 硅铍钇矿：一种墨绿色或绿黑色的硅酸盐矿物Be2FeY 2Si 2O 10，含有在铁混合物中的几种稀土 〔neodymium〕A bright, silvery rare-earth metal element, found in monazite and bastnaesite and used for coloring glass and for doping some glass lasers. Atomic number 60; atomic weight 144.24; melting point 1,024°C; boiling point 3,027°C; specific gravity 6.80 or 7.004 (depending on allotropic form); valence 3. See table at element 钕：一种亮银色的稀土金属元素，见于单独在石和氟碳锑矿中存在，用于给玻璃染色和给一些玻光器上色。原子序数60；原子量144.24；熔点1,024°C；沸点是3,027°C；比重6.80或7.004（视同素异形体而不同）；化合价3 参见 element〔monazite〕A reddish-brown phosphate mineral containing rare-earth metals, (Ce, La, Y, Th)PO4, important as a source of cerium and thorium. 独居石：一种含有稀土（铈、镧、钇、钍）的浅红褐色磷矿，分子式为PO4，它是铈和钍的重要来源 〔didymium〕A mixture of rare-earth elements and oxides used chiefly in manufacturing and coloring various forms of glass.稀土与氧化物混合物：稀土元素和氧化物的混合物，这要用于制造和给各种形式的玻璃上色〔yttrium〕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 1,522°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1,522°C；沸点3,338°C；比重4.45（在25°C时）；化合价3 参见 element〔limicoline〕Latin līmus [slime] * see lei- 拉丁语 līmus [烂泥，稀土] * 参见 lei- |
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