Symbol: Sb
Atomic Number: 51
Atomic Weight: 121.760
Element Classification: Semimetallic
Discovered By: Known to the ancients.
Discovery Date: n/a (Unknown)
Name Origin: Greek: anti and monos (not alone); symbol from mineral stibnite.
Density (g/cc): 6.691
Melting Point (K): 903.9
Boiling Point (K): 1908
Appearance: Hard, silvery-white, brittle semimetal
Atomic Radius (pm): 159
Atomic Volume (cc/mol): 18.4
Covalent Radius (pm): 140
Ionic Radius: 62 (+6e) 245 (-3)
Specific Heat (@20°C J/g mol): 0.205
Fusion Heat (kJ/mol): 20.08
Evaporation Heat (kJ/mol): 195.2
Thermal Conductivity (@25°C W/m K):
Debye Temperature (K): 200.00
Pauling Negativity Number: 2.05
First Ionizing Energy (kJ/mol): 833.3
Oxidation States: 5, 3, -2
Electronic Configuration: [Kr] 4d¹⁰ 5s² 5p³
Lattice Structure: Rhombohedral (RHL)
Lattice Constant (Å): 4.510
Lattice C/A Ratio: n/a