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
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
n/a
Evaporation Heat(kj/mol)
317
Thermal Conductivity(@25°C W/m K)
(14.5)
Debye Temperature
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
