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cerium |
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cerium [ˈsɪərɪəm] n (Chemistry / Elements & Compounds) a malleable ductile steel-grey element of the lanthanide series of metals, used in lighter flints and as a reducing agent in metallurgy. Symbol: Ce; atomic no.: 58; atomic wt.: 140.115; valency: 3 or 4; relative density: 6.770; melting pt.: 798°C; boiling pt.: 3443°C [New Latin, from Ceres (the asteroid) + -ium]
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a Nernst glower, which is a filament containing uranium, thorium and cerium oxide held together by a binder; and Cerium octoate (2-ethylhexanoate) for PVC, silicone rubber, and other polymers. The Asian behemoth now supplies approximately 95 percent of the world's consumption of "rare earths," such as cerium, neodymium, lathanum, yttrium, and dysprosium. |
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