Periodic Table of the Elements
Neodymium
Atomic Number: 60
Symbol: Nd
Atomic Weight: 144.24
Element Classification: Rare Earth Element (Lanthanide Series)
Discoverer: C.F. Ayer von Weisbach
Discovery Date: 1925 (Austria)
Name Origin: Greek: neos and didymos (new twin)
Density (g/cc): 7.007
Melting Point (K): 1294
Boiling Point (K): 3341
Appearance: silvery-white, rare earth metal that oxidizes readily in air
Atomic Radius (pm): 182
Atomic Volume (cc/mol): 20.6
Covalent Radius (pm): 184
Ionic Radius: 99.5 (+3e)
Specific Heat (@20°C J/g mol): 0.205
Fusion Heat (kJ/mol): 7.1
Evaporation Heat (kJ/mol): 289
Pauling Negativity Number: 1.14
First Ionizing Energy (kJ/mol): 531.5
Oxidation States: 3
Electronic Configuration: [Xe] 4f4 6s2
Lattice Structure: hexagonal
Lattice Constant (Å): 3.660
Lattice C/A Ratio: 1.614
References: Los Alamos National Laboratory (2001), Crescent Chemical Company (2001)
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