List of Lanthanum Isotopes and Lanthanum Applications:

Lanthanum-138 isotope (La-138 isotope, 138La isotope)

  • LANTHANUM-138 isotope is used for as a marker in isotopic dilution analysis;

Lanthanum-138 isotope is available to order from in Lanthanum-138 oxide (La2O3) chemical form. Please contact us via request a Lanthanum-138 isotope quote to order Lanthanum-138 isotope, to get Lanthanum-138 price and to buy Lanthanum-138 isotope.

Lanthanum-139 isotope (La-139 isotope, 139La isotope)

  • LANTHANUM-139 isotope is used for Cerium-139 (Ce-139 isotope, 139Ce isotope) radionuclide (radioisotope) production (can be used in life science for healthcare and medical applications and pharmaceuticals industries);
  • LANTHANUM-139 isotope is used for research in nuclear physics;

Lanthanum-139 isotope is available to order from in Lanthanum-139 oxide (La2O3) chemical form. Please contact us via request a Lanthanum-139 isotope quote to order Lanthanum-139 isotope, to get Lanthanum-139 price and to buy Lanthanum-139 isotope.

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Properties of Lanthanum Isotopes:

Properties of Lanthanum Isotopes:LANTHANUM-138LANTHANUM-139
Natural Abundance (%)0.08999.911
Atomic Mass (Da)137.907112138.9063533
Relative Isotopic Mass137.907112138.9063533
Neutron Number (N)8182
Atomic Number (Z)5757
Mass Number (A)138139
Nucleon Number (A)138139
Proton Number (Z)5757
Quadrupole Moment0.390.2
g-factor (g value)0.7427290.795156
Electron Configuration Blockdd
Melting Point (K)11931193
Boiling Point (K)37373737
Specific Heat0.1970.197
Heat of Formation431431
Thermal Conductivity13.413.4
Dipole Polarizability 215215
Electron Affinity (kJ/mole)0.5575460.557546
Electronegativity (Pauling scale)1.11.1
Atomic Radius (pm)187187
Covalent Radius (pm)195195
VDW Radius (pm)278278
Lattice Constant3.753.75
Crystal StructureDHCPDHCP
Jmol color#70d4ff#70d4ff

Lanthanum Information

Lanthanum is a silvery metallic element belonging to group 3 of the periodic table and oft considered to be one of the lanthanoids. It is found in some rare-earth minerals. 39 isotopes of lanthanum exist. There are 2 natural isotopes of lanthanum. One of them La-139 is stable and another one La-138 has a half-life of 10^10 to 10^15 years. It resembles the lanthanoids chemically. This element has a low to moderate level of toxicity, and should be handled with care. Lanthanum was discovered by C.G. Mosander in 1839.

Lanthanum is used in the electrodes of high-intensity, carbon-arc lights. Also it is used in the production of high-grade europium metal. Because this element gives glass refractive properties, it is used in expensive camera lenses.

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