Relative atomic mass: 174.967 +- 0.001

English: Lutetium
French: Lutetium
Croatian: Lutecij
German: Lutetium
Italian: Lutezio
Spanish: Lutecio

Atomic number: 71
Group numbers: 3
Period: 6
Standard state (20 oC): solid

Discovery: 1907 Georges Urbain (FR); Carl Freiherr Auer von Welsbach (AT)
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. The price of 99.9 % pure lutetium pieces is 555.30 for 5 g.
Electronic configuration: [Xe] 4f14 5d1 6s2
Formal oxidation number: +3
Atomic radius: 171.8 pm

Electronegativities: 1
Thermal conductivity: 16.4 W/(m K)
Electrical resistivity (20 oC): 79 microOhm cm

Melting point: 1663 oC
Boiling point: 3402 oC

Heat of fusion: 19.2 kJ/mol
Heat of vaporization: 428 kJ/mol
Heat of atomization: 427.37 kJ/mol

70Yb <= 71Lu => 72Hf

ASCII Periodic Table of the Elements
6 Jan. 2020
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