| 单词 | hafnium |
| 释义 | hafnium /haf"nee euhm, hahf"-/, n. Chem. a gray, toxic metallic element with a high melting point (over 2000°C), found in most zirconium minerals. Symbol: Hf; at. wt.: 178.49; at. no.: 72; sp. gr.: 12.1. [1923; < NL Hafn(ia) Copenhagen + -IUM] |
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