单词 | erbium |
释义 | erbium [`ǝr·bē·ǝm] CHEMISTRY A trivalent metallic rare-earth element, symbol Er, of the yttrium subgroup, found in euxenite, gadolinite, fergusonite, and xenotine; atomic number 68, atomic weight 167.26, specific gravity 9.051; insoluble in water, soluble in acids; melts at 1400-1500°C. |
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