68

Er

Erbium

167.26

Lathanide
Solid

Discovery

Mosander, Carl Gustav (1842)

Etymology

Swedish

Meaning

Location discovered

Electron configuration

Electron configuration

Crystal structure

Crystal structure

Hexagonal close-packed

Physical Properties

Phase

  (at 21 °C and 101.325 kPa)

Solid

Melting point

  (at 101.325 kPa)

1522.0 °C

1795.15 K

Boiling point

  (at 101.325 kPa)

2720.0 °C

2993.15 K

Density

  (at 21 °C and 101.325 kPa)

9.07 g/cm3

Electronegativity

1.24