CAS Number7439-94-3
PubChem CID23929
Atomic Radius174
Atomic Volume17.78
Atomic Weight174.967
Boiling Point3,402
Bulk Modulus
Crystal StructureSimple Hexagonal
Covalent Radius187
Electrical Resistivity
Electron Configuration[Xe] 4f14 5d1 6s2
Electrons per shell2, 8, 18, 32, 9, 2
Heat of Fusion22
Heat of Vaporization415
Ionization Potential5.426
Magnetic Ordering
Magnetic Susceptibility
Mass Number71
Melting Point1,652
Atomic Number175
Oxidation States3
Poisson Ratio
Shear Modulus
Specific Heat Capacity0.154
Thermal Conductivity0.164
Van der Waals radius
Young's Modulus
Abundance in Earth's crust0.000056%
Abundance in Universe1×10-8%
Lu Lutetium 71 174.967 6 d 71 1663.0 3402.0 [Xe] 6s2 4f14 5d1 2 8 18 32 9 2 9.84 0.000056% Silver Hexagonal 1.3 1.09 {"1":"523.5","2":"1340","3":"2022.3","4":"4370","5":"6445"} 524 50 3 1.75 17.8 18.6 355.0 0.15 16.4 0 Solid, Conductor, TransitionMetal, Metal, Stable, Natural loo-TEE-shi-em Silvery-white, hard, dense, rare earth metal. It has no practical applications. Found with ytterbium in gadolinite and xenotime. Usually obtained from monazite sand which is ofter 50% rare earth by weight and 0.003% lutetium. a5T1xXoR8XI Lutetium
Lanthanum was discovered in 1839 by Swedish chemist Carl Gustav Mosander.

He partially decomposed a sample of cerium nitrate by heating and treating the resulting salt with dilute nitric acid.

From the resulting solution, he obtained a pale brick colored oxide of the new rare earth.

Lanthanum was isolated in relatively pure form in 1923. From the Greek word lanthanein, to lie hidden 71 1907 Georges Urbain and Carl Auer von Welsbach France, Germany From the Greek word "Lutetia" meaning "Paris"

Isotopes of Lanthanum

Standard Atomic Weight


Stable Isotopes

175Lu 176Lu

Unstable Isotopes

150Lu 151Lu 152Lu 153Lu 154Lu 155Lu 156Lu 157Lu 158Lu 159Lu 160Lu 161Lu 162Lu 163Lu 164Lu 165Lu 166Lu 167Lu 168Lu 169Lu 170Lu 171Lu 172Lu 173Lu 174Lu 177Lu 178Lu 179Lu 180Lu 181Lu 182Lu 183Lu 184Lu

Lanthanum and its compounds are considered to be moderately toxic
Lanthanum is the most reactive of the rare earth metals
Lanthanum is used in large quantities in batteries for hybrid automobiles.

It is also used to make night vision goggles.

Small amounts of lanthanum, as an additive, can be used to produce nodular cast iron.

Lanthanum carbonate is used to reduce blood levels of phosphate in patients with kidney disease.