Dysprosium
Atomic Number: 66
Symbol: Dy
Atomic Weight: 162.50
Discovered By: Paul-Emile Lecoq de Boisbaudran
Discovery Date: 1886 (France)
Electronic Configuration: [Xe] 4f10 6s2
Atomic Weight: 162.50
Element Classification: Rare Earth (Lanthanide Series)
Name Origin: Greek: dysprositos (hard to get at)
Density (g/cc): 8.55
Melting Point (°K): 1685
Boiling Point (°K): 2835
Appearance: soft, lustrous, silvery metal
Atomic Radius (pm): 180
Atomic Volume (cc/mol): 19.0
Covalent Radius (pm): 159
Ionic Radius: 90.8 (+3e)
Specific Heat (@20°C J/g mol): 0.173
Evaporation Heat (kJ/mol): 291
First Ionizing Energy (kJ/mol): 567
Oxidation States: 3
Lattice Structure: Hexagonal
Lattice Constant (Å): 3.590
Lattice C/A Ratio: 1.573
Sources: Los Alamos National Laboratory (2001), Crescent Chemical Company (2001), Lange's Handbook of Chemistry (1952)
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