Erbium (Er)

Erbium metal ([Xe]4f¹²6s²) (CAS 7440-52-0) is soft, malleable, bright, and silvery. It does not oxidize as rapidly as some of the other rare earth metals as it is fairly stable in air. Erbium has a high electrical resistivity. As with other rare earth metals, properties depend on the impurities present. Naturally occurring erbium is a mixture of six stable isotopes.

Lanthanide Salts > Metal Alloys>

Phase at STP: Solid

Common Oxidation States: +3

Number of Valence Electrons: 2

Electronegativity (Pauling): 1.2

Covalent Radius:  1.57 Angstroms

Melting Point: 1529°C

Boiling Point: 2868°C

Density: 9.066 g/cm³

Crystal Structure: Hexagonal

Erbium metal ([Xe]4f¹²6s²) (CAS 7440-52-0) is soft, malleable, bright, and silvery. It does not oxidize as rapidly as some of the other rare earth metals as it is fairly stable in air. Erbium has a high electrical resistivity. As with other rare earth metals, properties depend on the impurities present. Naturally occurring erbium is a mixture of six stable isotopes.

Lanthanide Salts > Metal Alloys>

Phase at STP: Solid

Common Oxidation States: +3

Number of Valence Electrons: 2

Electronegativity (Pauling): 1.2

Covalent Radius:  1.57 Angstroms

Melting Point: 1529°C

Boiling Point: 2868°C

Density: 9.066 g/cm³

Crystal Structure: Hexagonal

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