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This is erbium.

Symbol Er
Atomic number 68
Atomic mass 167.26 amu

Erbium is an element in the lanthanide series. It was discovered in 1843.

Distinguishing properties

Erbium oxide is used in ceramics to produce a pink glaze. Erbium, holmium, and dysprosium are almost identical to each other in terms of their chemical and physical properties.

See also

Periodic table of the elements