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haf·ni·um AHD[hăfʹnē-əm] D.J.[ˈhæfniːəm]K.K.[ˈhæfniəm]n.Symbol Hf （名词）符号 Hf - A brilliant, silvery, metallic element separated from ores of zirconium and used in nuclear reactor control rods, as a getter for oxygen and nitrogen, and in the manufacture of tungsten filaments. Atomic number 72; atomic weight 178.49; melting point 2,220°C; boiling point 5,400°C; specific gravity 13.3; valence 4. See table at element 铪：一种锆矿中分离出来的亮银色金属元素，用于核反应堆的控制棒，可形成氧气和氮气的保护膜，还用于钨丝的制造。原子序数72；原子量178.49；熔点2,220°C；沸点5,400°C；比重13.3；原子价4 参见 element
- After Hafnia , Medieval Latin name for Copenhagen, Denmark 源自 哈夫尼尔 ，丹麦哥本哈根的中世纪拉丁名
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