Erbium, Er, is a soft silvery metallic element, which is found in
the lanthanide series of inner transition metals in
Group IIIa of
the periodic table.
Erbium consists of six stable isotopes. Nine radioactive isotopes
are also known.
- Atomic Number : 68
- Relative Atomic Mass : 167.26
- Melting Point : 1529 degC
- Boiling Point : 2868 degC
- Relative Density : 9.066
Erbium was discovered by C G Mosander in 1843AD.
Erbium was isolated by Urbain and James in 1905AD.
Erbium, Er, occurs with the rare earths in their ores.
Erbium is separated from other rare earths by
ion exchange chromatography.
Erbium was prepared by Klemm and Bommer in 1934AD by reducing
anhydrous erbium chloride with potassium vapour.
Erbium is a soft malleable silvery metal, which is stable in air.
Erbium is used in pottery, enamels and glass to impart a pink
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