单词 | 光学玻璃 |
释义 | 〔germanium〕A brittle, crystalline, gray-white metalloid element, widely used as a semiconductor, as an alloying agent and catalyst, and in certain optical glasses. Atomic number 32; atomic weight 72.59; melting point 937.4°C; boiling point 2,830°C; specific gravity 5.323 (at 25°C); valence 2, 4. See table at element 锗:一种银白色的脆而透明的金属元素,被广泛用作半导体,可作一种合成剂和催化剂,还被用在光学玻璃中。原子序数32;原子量72.59;熔点937.4°C;沸点2,830°C;比重5.323(在25°C时);化合价2,4 参见 element |
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