Symbol: Dy
Atomic Number: 66
Atomic Weight: 162.50
Element Classification: Rare Earth Element (Lanthanide Series)
Discovered By: Paul-Emile Lecoq de Boisbaudran
Discovery Date: 1886 (France)
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
Fusion Heat (kJ/mol): n/a
Evaporation Heat (kJ/mol): 291
Thermal Conductivity (@25°C W/m K):
Debye Temperature (K): n/a
Pauling Negativity Number: n/a
First Ionizing Energy (kJ/mol): 567
Oxidation States: 3
Electronic Configuration: [Xe] 4f¹⁰ 6s²
Lattice Structure: Hexagonal (HEX)
Lattice Constant (Å): 3.590
Lattice C/A Ratio: 1.573