CAS Number7440-27-9
PubChem CID23958
Atomic Radius177
Atomic Volume19.2
Atomic Weight158.925
Boiling Point3,230
Bulk Modulus
Crystal StructureSimple Hexagonal
Covalent Radius194
Electrical Resistivity
Electron Configuration[Xe] 4f9 6s2
Electrons per shell2, 8, 18, 27, 8, 2
Heat of Fusion10.8
Heat of Vaporization295
Ionization Potential5.864
Magnetic Ordering
Magnetic Susceptibility
Mass Number65
Melting Point1,356
Atomic Number159
Oxidation States1, 3, 4
Poisson Ratio
Shear Modulus
Specific Heat Capacity0.182
Thermal Conductivity0.111
Van der Waals radius
Young's Modulus
Abundance in Earth's crust0.000093%
Abundance in Universe5×10-8%
Tb Terbium 65 158.92535 6 f 65 1365.0 3230.0 [Xe] 4f9 6s2 2 8 18 27 8 2 8.23 0.000093% Silver Hexagonal {"1":"565.8","2":"1110","3":"2114","4":"3839"} 566 50 +3,4 1.8 19.2 15.48 0.18 11.1 230.K 0 Solid, Paramagnetic, Conductor, Lanthanide, Stable, Natural TUR-bi-em Soft, ductile, silvery-gray, rare earth metal. It is used in modest amounts in special lasers and solid-state devices. Found with other rare earths in monazite sand, which typically contain 0.03% terbium. Other sources are xenotime and euxenite, both of which are oxide mixtures that can contain up to 1% terbium. 2Nwr9E2BBTo Terbium
One of antimony's minerals, stibnite was recognized in predynastic Egypt as an eye cosmetic as early as about 3100 BC.

The first European description of a procedure for isolating antimony is in the book De la pirotechnia of 1540 by Vannoccio Biringuccio.

The first natural occurrence of pure antimony in the Earth's crust was described by the Swedish scientist and local mine district engineer Anton von Swab in 1783. From the Greek word anti plus monos - a metal not found alone 65 1843 Carl Mosander Sweden Named after "Ytterby", a town in Sweden

Isotopes of Antimony

Standard Atomic Weight


Stable Isotopes


Unstable Isotopes

136Tb 137Tb 138Tb 139Tb 140Tb 141Tb 142Tb 143Tb 144Tb 145Tb 146Tb 147Tb 148Tb 149Tb 150Tb 151Tb 152Tb 153Tb 154Tb 155Tb 156Tb 157Tb 158Tb 160Tb 161Tb 162Tb 163Tb 164Tb 165Tb 166Tb 167Tb 168Tb 169Tb 170Tb 171Tb

Antimony and many of its compounds are toxic
Antimony is a poor conductor of heat and electricity
The largest applications for metallic antimony are as alloying material for lead and tin and for lead antimony plates in lead-acid batteries.

Alloying lead and tin with antimony improves the properties of the alloys which are used in solders, bullets and plain bearings.

Antimony trioxide is used as a flame retardant in adhesives, plastics, rubber and textiles.