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Neighborhood
 
Y
39
Zr
40
Yb
70
Lu
71
Hf
72
No
102
Lr
103
Rf
104

 

Periodic table

de  German

Lutetium

en  English

Lutetium

fr  French

Lutétium

hr  Croatian

Lutecij

it  Italian

Lutezio

es  Spanish

Lutecio

 

Lu
Lu
Lutetium

PERIODIC TABLE OF THE ELEMENTS

LUTETIUM

TRANSITION ELEMENT:
LANTHANIDE

 

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:174.9668 ± 0.0001

 

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.

PHYSICAL PROPERTIES

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

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

Electrical resistivity / μΩcm:79 (20 °C)

THERMAL PROPERTIES

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

IONIZATION ENERGIES

First ionization energy / kJ mol-1:523.52

Second ionization energy / kJ mol-1:1341.16

Third ionization energy / kJ mol-1:2022.29

ABUNDANCE OF ELEMENTS

in the atmosphere / ppm:-

in the Earth's crust / ppm:0.3

in the oceans / ppm:-

CRYSTALLOGRAPHIC DATA

hexagonal

Crystal structure:

hexagonal

Unit-cell dimensions / pm:

a=350.31, c=555.09

Space group:

P63/mmc

ISOTOPES

IsotopeRelative atomic massMass percent (%)
175Lu174.940768(3)97.41(2)
176Lu175.942682(3)2.59(2)

REDUCTION POTENTIALS

Balanced half-reaction Eo / V

 

70 Ytterbium <=
71 Lutetium
=> 72 Hafnium