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Lutetium-Discovery, Properties, And Applications

October 18, 2023
written by Adeel abbas

Lutetium is a rare earth element with the atomic number 71 and symbol Lu. It belongs to the lanthanide series and is the last element in the series. Lutetium is a silver-white metal that is soft and ductile. It has a high melting point and is stable in air.

image of lutetium element
Atomic number71
Relative atomic mass (Ar)Period in the periodic table
Standard stateSolid at 298 K
AppearanceSilvery white
Group in periodic table3
Group name(none)
Group in the periodic table6
Block in periodic tabled
Shell structure2.
CAS Registry7439-94-3


Lutetium was first discovered in 1907 by a French chemist named Georges Urbain. He named the element after Lutetia, the Latin name for Paris.

Physical Properties

Lutetium is a silvery-white metal with a melting point of 1663°C and a boiling point of 3402°C. It has a density of 9.84 g/cm3, making it one of the densest elements. Lutetium is a rare earth element and is paramagnetic at room temperature.

Chemical Properties

Lutetium is a highly reactive element and easily forms compounds with other elements. It is not found in nature as a free element but is found in minerals such as monazite and xenotime. Lutetium is used in the production of nuclear fuel, as well as in medical imaging and cancer treatment.


  • Lutetium is the most expensive rare earth element.
  • It is the last element in the lanthanide series.
  • Lutetium has 35 isotopes, with only one being stable.
  • It is used in nuclear reactors and in cancer treatment.
  • Lutetium has no biological role in humans.


Lutetium has several applications in various fields, including:

  • Nuclear power generation
  • Medical imaging and cancer treatment
  • Research in physics and chemistry
  • Production of synthetic gems and alloys

Lutetium is a rare earth element with unique physical and chemical properties. It has a wide range of applications in various fields, including nuclear power generation, medical imaging and cancer treatment, and research in physics and chemistry. As a highly reactive element, lutetium plays an important role in the development of new materials and technologies.