Samarium
Symbol
Sm
Atomic Number
62
Atomic Weight
150.36
Element Classification
Discovered By
Jean Charles Galissard de Marignac
Discovery Date
1853 (France)
Name Origin
Named after the mineral samarskite.
Density (g/cc)
7.520
Melting Point (K)
1350
Boiling Point (K)
2064
Appearance
Silvery rare-earth metal
Atomic Radius (pm)
181
Atomic Volume (cc/mol)
19.9
Covalent Radius (pm)
162
Ionic Radius
96.4 (+3e)
Specific Heat
0.180
Fusion Heat (kJ/mol)
8.9
Evaporation Heat (kJ/mol)
165
Thermal Conductivity (@25°C W/m K)
(13.3)
Debye Temperature (K)
166.00
Pauling Negativity Number
1.17
First Ionizing Energy (kJ/mol)
540.1
Oxidation States
3, 2
Electronic Configuration
[Xe] 4f6 6s2
Lattice Structure
Rhombohedral(RHL)
Lattice Constant
9.000
Lattice C/A Ratio
n/a
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