Periodic table

 

 

Atomic number:65

Group numbers:3

Period:6

Electronic configuration:[Xe] 4f⁹ 6s²

Formal oxidation number:+3

Electronegativities:-

Atomic radius / pm:176.3

Relative atomic mass:158.92535 ± 0.00002

 

Terbium was discovered by Carl Gustaf Mosander (SE) in 1843. Named after Ytterby, a village in Sweden. It is a soft, ductile, silvery-grey, rare earth metal that oxidizes slowly in air and reacts with cold water. Terbium is found with other rare earths in monazite sand. Other sources are xenotime and euxenite, both of which are oxide mixtures that can contain up to 1% terbium. It is used in modest amounts in special lasers and solid-state devices.

PHYSICAL PROPERTIES

Density / g dm^-3:8229 (293 K)

Molar volume / cm³mol^-1:19.31 (293 K)

Electrical resistivity / μΩcm:116 (20 °C)

THERMAL PROPERTIES

Thermal conductivity / W m^-1K^-1:11.1

Melting point / °C:1356

Boiling point / °C:3230

Heat of fusion / kJ mol^-1:16.3

Heat of vaporization / kJ mol^-1:391

Heat of atomization / kJ mol^-1:390.62

IONIZATION ENERGIES

First ionization energy / kJ mol^-1:565.77

Second ionization energy / kJ mol^-1:1111.52

Third ionization energy / kJ mol^-1:2114.01

ABUNDANCE OF ELEMENTS

in the atmosphere / ppm:-

in the Earth's crust / ppm:0.6

in the oceans / ppm:0.0000014

CRYSTALLOGRAPHIC DATA

ISOTOPES

REDUCTION POTENTIALS

 

Scientific calculator for chemists
Download printable materials	|   |	Free software for Windows
Periodic Table of the Elements

 

Citing this page:

Generalic, Eni. "Terbium." EniG. Periodic Table of the Elements. 3 Jan. 2012. KTF-Split. {Date of access}. <http://www.periodni.com/tb.html>.