Erbium
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Erbium is a chemical element; it has symbol Er and atomic number 68. A silvery-white solid metal when artificially isolated, natural erbium is always found in chemical combination with other elements.
Erbium
Erbium(III) chloride in sunlight, showing some pink fluorescence of Er3+ from natural ultraviolet.
Erbium(III) oxide powder
Carl Gustaf Mosander, the scientist who discovered erbium, lanthanum and terbium
Ytterby
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Ytterby is a village on the Swedish island of Resarö, in Vaxholm Municipality in the Stockholm archipelago. Today the residential area is dominated by suburban homes.
Erbium
…erbium is always found in chemical combination with other elements. It is a lanthanide, a rare-earth element, originally found in the gadolinite mine in Ytterby, Sweden, which is the source of the element's name. Erbium's principal uses involve its pink-colored Er3+ ions, which have optical fluorescent properties…
Ytterby quarry
Terbiumvägen (Terbium Road) and Gruvvägen (Mine Road) close to the Ytterby mine (59°25′35″N 18°21′13″E / 59.4265°N 18.3535°E / 59.4265; 18.3535 (Ytterby mine))
Plaque of the ASM International society at the entrance of Ytterby mine