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osmium |
Also found in: Medical, Acronyms, Encyclopedia, Wikipedia, Hutchinson | 0.02 sec. |
osmium [ˈɒzmɪəm] n (Chemistry / Elements & Compounds) a very hard brittle bluish-white metal occurring with platinum and alloyed with iridium in osmiridium: used to produce platinum alloys, mainly for pen tips and instrument pivots, as a catalyst, and in electric-light filaments. Symbol: Os; atomic no.: 76; atomic wt.: 190.2; valency: 0 to 8; relative density: 22.57; melting pt.: 3033±30°C; boiling pt.: 5012±100°C [from Greek osmē smell, so called from its penetrating odour]
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