Holmium
Atomic Number: 67
Symbol: Ho
Atomic Weight: 164.93032
Discovery: Delafontaine 1878 or J.L. Soret 1878 (Switzerland)
Electron Configuration: [Xe] 4f11 6s2
Element Classification: Rare Earth (Lanthanide)
Word Origin: Holmia, the Latinized name for Stockholm, Sweden.
Density (g/cc): 8.795
Melting Point (K): 1747
Boiling Point (K): 2968
Appearance: relatively soft, malleable, lustrous, silvery metal
Atomic Radius (pm): 179
Atomic Volume (cc/mol): 18.7
Covalent Radius (pm): 158
Ionic Radius: 89.4 (+3e)
Specific Heat (@20°C J/g mol): 0.164
Evaporation Heat (kJ/mol): 301
Pauling Negativity Number: 1.23
First Ionizing Energy (kJ/mol): 574
Oxidation States: 3
Lattice Structure: Hexagonal
Lattice Constant (Å): 3.580
Lattice C/A Ratio: 1.570
References: Los Alamos National Laboratory (2001), Crescent Chemical Company (2001), Lange's Handbook of Chemistry (1952), CRC Handbook of Chemistry & Physics (18th Ed.)
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