Lutetium (German Cassiopeium)
Atomic Number: 71
Symbol: Lu
Atomic Weight: 174.967
Discovery: Georges Urbain 1907 (France)
Electron Configuration: [Xe] 4f14 5d1 6s2
Element Classification: Rare Earth (Lanthanide Series)
Word 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 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
Evaporation Heat (kJ/mol): 414
Pauling Negativity Number: 1.27
First Ionizing Energy (kJ/mol): 513
Oxidation States: 3
Lattice Structure: Hexagonal
Lattice Constant (Å): 3.510
Lattice C/A Ratio: 1.585
References: Los Alamos National Laboratory (2001), Crescent Chemical Company (2001), Lange's Handbook of Chemistry (1952), CRC Handbook of Chemistry & Physics (18th Ed.)
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