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  • 7440-27-9
  • Tb
  • 99.95%
  • 3 inch dia x 0.25 inch th.etc
  • 231-137-6
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Description

Characteristic

Terbium is a chemical element with the symbol Tb and atomic number 65. It is a silvery-white, rare earth metal that is malleable, ductile, and soft enough to be cut with a knife.

Phase at STP: solid

Melting point: 1629 K (1356 °C, 2473 °F)

Boiling point: 3396 K (3123 °C, 5653 °F)

Density (near r.t.): 8.23 g/cm3

when liquid (at m.p.): 7.65 g/cm3

Heat of fusion: 10.15 kJ/mol

Heat of vaporization: 391 kJ/mol

Molar heat capacity: 28.91 J/(mol·K)

Application

Terbium 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. As a component of Terfenol-D (an alloy that expands and contracts when exposed to magnetic fields more than any other alloy), terbium is of use in actuators, in naval sonar systems and in sensors.