Symbol: Lu
Atomic Number: 71
Atomic Weight: 174.967
Element Classification: Rare Earth Element (Lanthanide Series)
Discovered By: Georges Urbain
Discovery Date: 1907 (France)
Name Origin: Named for the ancient name of Paris, Lutecia.
Density (g/cc): 9.8404
Melting Point (K): 1936
Boiling Point (K): 3668
Appearance: Silvery-white, hard, dense, rare-earth metal
Atomic Radius (pm): 175
Atomic Volume (cc/mol): 17.8
Covalent Radius (pm): 156
Ionic Radius: 85 (+3e)
Specific Heat (@20°C J/g mol): 0.155
Fusion Heat (kJ/mol): n/a
Evaporation Heat (kJ/mol): 414
Thermal Conductivity (@25°C W/m K):
Debye Temperature (K): n/a
Pauling Negativity Number: 1.27
First Ionizing Energy (kJ/mol): 513
Oxidation States: 3
Electronic Configuration: [Xe] 4f¹⁴ 5d¹ 6s²
Lattice Structure: Hexagonal (HEX)
Lattice Constant (Å): 3.510
Lattice C/A Ratio: 1.585