Atomic number:71

Group numbers:3

Period:6

Electronic configuration:[Xe] 4f¹⁴ 5d¹ 6s²

Formal oxidation number:+3

Electronegativities:1

Atomic radius / pm:171.8

Relative atomic mass:174.967 ± 0.001

 

Lutetium was discovered by Georges Urbain (FR) and independently by Carl Freiherr Auer von Welsbach (AT) in 1907. The origin of the name comes from the Greek word Lutetia meaning Paris. It is a silvery-white and relatively stable in air, rare earth metal. Lutetium is found with ytterbium in gadolinite and xenotime. Stable lutetium nuclides can be used as catalysts in cracking, alkylation, hydrogenation, and polymerization.

Density / g dm^-3:9840 (298 K)

Molar volume / cm³mol^-1:17.78 (298 K)

Electrical resistivity / μΩcm:79 (20 °C)

Thermal conductivity / W m^-1K^-1:16.4

Melting point / °C:1663

Boiling point / °C:3402

Heat of fusion / kJ mol^-1:19.2

Heat of vaporization / kJ mol^-1:428

Heat of atomization / kJ mol^-1:427.37

1st ionization energy / kJ mol^-1:523.52

2nd ionization energy / kJ mol^-1:1341.16

3rd ionization energy / kJ mol^-1:2022.29

in the atmosphere / ppm:-

in the Earth's crust / ppm:0.3

in the oceans / ppm:-