Holmium

Symbol: Ho
Atomic Number: 67
Atomic Weight: 164.93032
Element Classification: Rare Earth Element (Lanthanide Series)
Discovered By: J.L. Soret
Discovery Date: 1878 (Switzerland)
Name Origin: Holmia, the Latinized name for Stockholm, Sweden.

Density (g/cc): 8.795
Melting Point (K): 1747
Boiling Point (K): 2968
Appearance: Fairly 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 (@20C J/g mol): 0.164
Fusion Heat (kJ/mol): n/a
Evaporation Heat (kJ/mol): 301
Thermal Conductivity (@25C W/m K):
Debye Temperature (K): n/a
Pauling Negativity Number: 1.23
First Ionizing Energy (kJ/mol): 574
Oxidation States: 3
Electronic Configuration: [Xe] 4f11 6s2
Lattice Structure: Hexagonal (HEX)
Lattice Constant (): 3.580
Lattice C/A Ratio: 1.570
Brinell Hardness [/MN m-2]: 746
Vickers Hardness [/MN m-2]: 481

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