Category
page 1Erbium
chloride%20sunlight.jpg)
erbium
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. 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.
Carl Gustaf Mosander
Swedish chemist and mineralogist (1797–1858)
isotope of erbium
Er:YAG laser
Solid-state laser