Stable isotopes of lutetium available from ISOFLEX
|Isotope||Z(p)||N(n)||Atomic Mass||Natural Abundance||Enrichment Level||Chemical Form|
Lutetium was discovered in 1907 by Georges Urbain and Carl Auer von Welsbach. Its name originates with the Latin Lutetia, the name of a Roman town on the site of modern-day Paris.
Lutetium is a silvery-white, lustrous metal with a hexagonal close-packed structure. It is soft, ductile and slightly paramagnetic. It reacts slowly with water and is soluble in dilute acids. In aqueous media, lutetium occurs as tripositive Lu3+ ion. Aqueous solutions of all its salts are colorless, while in dry form they are white crystalline solids. Lutetium's soluble salts — such as chloride, bromide, iodide, nitrate, sulfate and acetate — form hydrates upon crystallization. The oxide, hydroxide, fluoride, carbonate, phosphate and oxalate of the metal are insoluble in water. The metal dissolves in acids, forming the corresponding salts upon evaporation of the solution and crystallization.
There is very limited commercial application for lutetium. The metal emits beta particles after thermal neutron activation, and it is used to catalyze organic reactions as well as for dating meteorites. Stable lutetium can be used in petroleum cracking in refineries, as well as for alkylation, hydrogenation and polymerization applications. Its synthetic isotope Lutetium-177, when bound to octreotate, is used experimentally in targeted radionuclide therapy for neuroendocrine tumors.
Properties of Lithium
|Standard state||Solid at 298 ºK|
|CAS Registry ID||7439-94-3|
|Group in periodic table||3|
|Period in periodic table||6|
|Block in periodic table||d-block|
|Melting point||1663 °C|
|Boiling point||3395 °C|
|Vaporization point||3402 ºC|
|Thermal conductivity||16.4 W/(m·K) at 298.2 °K|
|Electrical resistivity||79.0 µΩ·cm at 25 °C|
|Specific heat||0.155 J/g mol at 25 °C|
|Heat of vaporization||415 kJ·mol-1 at 3395 °C|
|Heat of fusion||22 kJ·mol-1|
|Density of liquid||9.3 g/cm3 at 1663 °C|
|Density of solid||9.84 g/cm3|
|Atomic radius||1.7349 Å (coordination number 12)|
|Ionic radius||Lu3+: 0.85 Å|