Terbium
Symbol
Tb
Atomic Number
65
Atomic Weight
158.92534
Element Classification
Discovered By
Carl Mosander
Discovery Date
1843 (Sweden)
Name Origin
Named after Ytterby, a village in Sweden.
Density(g/cc)
8.229
Melting Point
1629
Boiling Point(K)
3296
Appearance
Soft, ductile, silvery-gray, rare-earth metal
Atomic Radius(pm)
180
Atomic Volume(cc/mol)
19.2
Covalent Radius(pm)
159
Ionic Radius
84 (+4e) 92.3 (+3e)
Specific Heat
0.183
Fusion Heat
n/a
Evaporation Heat(kj/mol)
389
Thermal Conductivity(@25°C W/m K)
11.1
Debye Temperature
n/a
Pauling Negativity Number
1.2
First Ionizing Energy(kj/mol)
569
Oxidation States
4, 3
Electronic Configuration
[Xe] 4f9 6s2
Lattice Structure
Hexagonal(HEX)
Lattice Constant
3.600
Lattice C/A Ratio
1.581
