Dysprosium

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 (@20C J/g mol): 0.173
Fusion Heat (kJ/mol): n/a
Evaporation Heat (kJ/mol): 291
Thermal Conductivity (@25C 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 (): 3.590
Lattice C/A Ratio: 1.573

Brinell Hardness [/MN m-2]: 500
Vickers Hardness [/MN m-2]: 540

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