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Element 62 - Samarium (Sm) sound

From the mineral smarskite, named after a Russian mine official, Colonel V.E. Samarsky; discovered 1879. Calcium chloride crystals treated with smarium have been employed in lasers--devices for produceing beams of light intense enough to burn metal or bounce off the moon.

Properties

Atomic Number: 62
Atomic Weight: 150.36
Electron Configuration (at ground state): 1s22s22p63s23p63d104s24p64d104f65s25p66s2
Oxidation States (Bold most stable): +3, +2
Boiling Point (K): 2067
Melting Point (K): 1347
Density (at 300K -- g/cm3): 7.52
Atomic Volume (at 300K -- cm3/mol) 19.90
Number of stable isotopes: 6
Number of natural radioactive isotopes: 1
Mass Number (Bold naturally occurring) -- Half-Life -- Disintigration Type: 146 -- 7 x 107 years -- alpha particle emission
151 -- 93 years -- beta particle (electron) emission
Covalent Radius (Å): 1.62
Atomic Radius (Å): 1.81
First Ionization Potential (V): 5.63
Electronegativity (Pauling's): 1.17
Specific Heat Capacity (at 300K -- J g-1 K-1): 0.197
Heat of Vaporization (kJ/mol): 191.63
Heat of Fusion (kJ/mol): 11.09
Electrical Conductivity (at 293K for polycrystalline material -- 106 (ohms)-1 cm-1): 1.1
Thermal Conductivity (at 300K -- W m-1 K-1): 13.3
Crystal Structure: Rhombohedral
Acid-Base Properties: Very basic