Terbium Properties, Molecular Formula, Applications - WorldOfChemicals

Terbium Properties




Terbium is a rare earth metal that is malleable,ductile and soft enough to be cut with a knife. It is never found in nature as a free element, but it is contained in many minerals, including cerite, gadolinite, monazite, xenotime and euxenite. It is used to dope calcium fluoride, calcium tungstate and strontium molybdate, materials that are used in solid-state devices, and as a crystal stabilizer of fuel cells which operate at elevated temperatures. It is also used in alloys and in the production of electronic devices. As a component of Terfenol-D, terbium is of use in actuators, in naval sonar systems and in sensors. Terbium oxide is used in green phosphors in fluorescent lamps and color TV tubes.

Chemical Properties

Appearance Silvery White Solid
Atomic Number 65
Atomic Weight 158.925 g/mol
Block f
Boiling Point 3230 °C
CAS Number 7440-27-9
Crystal Structure Hexagonal
Density 8.23 g/cm3
EINECS Number 231-137-6
Electron Configuration 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 5s2 4d10 5p6 4f96s2
Ionization Energy 565.8 KJ/mol
Melting Point 1356 °C
Oxidation State 4,3,2,1
Period 6
Symbol Tb
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