| 单词 | 氟碳铈矿 |
| 释义 | 〔lanthanum〕A soft, silvery-white, malleable, ductile, metallic rare-earth element, obtained chiefly from monazite and bastnaesite and used in glass manufacture and with other rare earths in carbon lights for movie and television studio lighting. Atomic number 57; atomic weight 138.91; melting point 920°C; boiling point 3,469°C; specific gravity 5.98 to 6.186; valence 3. See table at element 镧：一种质软、银白色、有延展性的、可塑性的稀有金属，主要是从独居石和氟碳铈矿中提取出来，用于玻璃工业及电影或电视摄影照明的碳棒灯中。原子序数57；原子量138.91；熔点920°C；沸点3,496°C；比重5.98到6.186；原子价3 参见 element〔cerium〕A lustrous, iron-gray, malleable metallic rare-earth element that occurs chiefly in the minerals monazite and bastnaesite, exists in four allotropic states, is a constituent of lighter flint alloys, and is used in various metallurgical and nuclear applications. Atomic number 58; atomic weight 140.12; melting point 795°C; boiling point 3,468°C; specific gravity 6.67 to 8.23; valence 3, 4. See table at element 铈：一种有光泽、铁灰色、可延展的金属稀土元素，主要存在于独居石和氟碳铈矿中，以四种同素异形体存在，是轻燧石合金的成分，在冶金和核能工业上有多种应用。原子序数58；原子量140.12；熔点795°C；沸点3,468°C；比重6.67至8.23；化合价3,4 参见 element〔gadolinium〕A silvery-white, malleable, ductile, metallic rare-earth element obtained from monazite and bastnaesite and used in improving high-temperature characteristics of iron, chromium, and related alloys. Atomic number 64; atomic weight 157.25; melting point 1,312°C; boiling point approximately 3,000°C; specific gravity from 7.8 to 7.896; valence 3. See table at element 钆：一种从独居石和氟碳铈矿中获得的银白色、有韧性和延展性的稀金属元素，用于改善铁铬及有关合金的高温状态下的性能。原子序数为64；原子量为157.25；熔点为1,312°C；沸点约为3,000°C；比重为7.8至7.896；化合价为3 参见 element〔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 |
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