Symbol: Yb
Atomic Number: 70
Atomic Weight: 173.04
Element Classification: Rare Earth Element (Lanthanide Series)
Discovered By: Jean de Marignac
Discovery Date: 1878 (Switzerland)
Name Origin: Named for the Swedish village of Ytterby.

Density (g/cc): 6.9654
Melting Point (K): 1097
Boiling Point (K): 1466
Appearance: Silvery, lustrous, malleable, and ductile metal
Atomic Radius (pm): 194
Atomic Volume (cc/mol): 24.8
Covalent Radius (pm): n/a
Ionic Radius: 85.8 (+3e) 93 (+2e)
Specific Heat (@20C J/g mol): 0.145
Fusion Heat (kJ/mol): 3.35
Evaporation Heat (kJ/mol): 159
Thermal Conductivity (@25C W/m K):
Debye Temperature (K): n/a
Pauling Negativity Number: 1.1
First Ionizing Energy (kJ/mol): 603
Oxidation States: 3, 2
Electronic Configuration: [Xe] 4f14 6s2
Lattice Structure: Face-Centered Cubic (FCC)
Lattice Constant (): 5.490
Lattice C/A Ratio: n/a

Brinell Hardness [/MN m-2]: 343
Vickers Hardness [/MN m-2]: 206

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