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germanium |
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germanium [dʒɜːˈmeɪnɪəm] n (Chemistry / Elements & Compounds) a brittle crystalline grey element that is a semiconducting metalloid, occurring principally in zinc ores and argyrodite: used in transistors, as a catalyst, and to strengthen and harden alloys. Symbol: Ge; atomic no.: 32; atomic wt.: 72.61; valency: 2 or 4; relative density: 5.323; melting pt.: 938.35°C; boiling pt.: 2834°C [New Latin, named after Germany]
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| Zou, chemist Michael O'Keeffe of Arizona State University in Tempe, and their colleagues had been synthesizing porous crystals made with germanium oxide. NIST and the National Research Council of Canada (NRC) recently completed a bilateral comparison of routine spectral responsivity calibrations from 250 nm to 1800 nm, using silicon, germanium, and indium gallium arsenide photodiodes as transfer standards. IBM has shipped the 100 millionth chip made with silicon germanium (SiGe), a technology pioneered by IBM that is revolutionizing the design of cell phones and other wireless electronic products. |
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