Erbium
Symbol
Er
Atomic Number
68
Atomic Weight
167.26
Element Classification
Discovered By
Carl Mosander
Discovery Date
1843 (Sweden)
Name Origin
Named after the Swedish town, Ytterby.
Density (g/cc)
9.06
Melting Point (K)
1802
Boiling Point (K)
3136
Appearance
Soft, malleable, silvery metal
Atomic Radius (pm)
178
Atomic Volume (cc/mol)
18.4
Covalent Radius (pm)
157
Ionic Radius
88.1 (+3e)
Specific Heat
0.168
Fusion Heat (kJ/mol)
n/a
Evaporation Heat (kJ/mol)
317
Thermal Conductivity (@25°C W/m K)
(14.5)
Debye Temperature (K)
n/a
Pauling Negativity Number
1.24
First Ionizing Energy (kJ/mol)
581
Oxidation States
3
Electronic Configuration
[Xe] 4f12 6s2
Lattice Structure
Hexagonal(HEX)
Lattice Constant
3.560
Lattice C/A Ratio
1.570
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