Thallium Isotopes

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List of Thallium Isotopes and Examples of Enriched Thallium Applications:

Thallium-203 isotope (Tl-203 isotope, 203Tl isotope)

  • THALLIUM-203 isotope is used for Thallium-201 radionuclide (radioisotope) production (can be used in life science for healthcare and medical applications and pharmaceuticals industries);

Thallium-203 isotope is available to order from BuyIsotope.com Thallium-203 metal chemical form and Thallium-203 oxide chemical form. Please contact us via request a Thallium-203 isotope quote BuyIsotope.com to order Thallium-203 isotope to get Thallium-203 price to buy Thallium-203 isotope.

Thallium-205 isotope (Tl-205 isotope, 205Tl isotope)

  • THALLIUM-205 isotope is used for Thallium-201 radionuclide (radioisotope) production (can be used in life science for healthcare and medical applications and pharmaceuticals industries);
  • THALLIUM-205 isotope is used for studies of thallium compounds through nuclear magnetic resonance (NMR);

Thallium-205 isotope is available to order from BuyIsotope.com Thallium-205 metal chemical form and Thallium-205 oxide chemical form. Please contact us via request a Thallium-205 isotope quote BuyIsotope.com to order Thallium-205 isotope to get Thallium-205 price to buy Thallium-205 isotope.

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Thallium metal Safety Data Sheet (SDS) - Download pdf file
Download Thallium metal SDS

Thallium oxide Safety Data Sheet (SDS) - Download pdf file
Download Thallium oxide SDS

Properties Of Thallium Isotopes:

PropertyTHALLIUM-203THALLIUM-205
Neutron Number (N)122124
Atomic Number / Proton Number (Z)8181
Mass Number / Nucleon Number (A)203205
Natural Abundance (%)0.29440.7041
Atomic Mass (Da)202.972345204.974428
Relative Isotopic Mass202.972345204.974428
Spin0.50.5
Quadrupole Moment00
g-factor (g value)3.244515743.2764292
Half-life
Group1313
Period66
Electron Configuration Blockpp
Melting Point (K)576.6576.6
Boiling Point (K)17301730
Specific Heat0.1280.128
Heat of Formation182.2182.2
Thermal Conductivity46.146.1
Dipole Polarizability 5050
Electron Affinity (kJ/mole)0.3770.377
Electronegativity (Pauling scale)1.81.8
Atomic Radius (pm)171171
Covalent Radius (pm)190190
VDW Radius (pm)259259
Lattice Constant3.463.46
Crystal StructureHEXHEX
Jmol color#a6544d#a6544d

Thallium Information

Pure, unreacted thallium appears silvery-white and exhibits a metallic lustre. Upon reacting with air, it begins to turn bluish-grey and looks like lead. It is very malleable, and can be cut with a knife. There are two stable isotopes, and four radioisotopes, Tl-204 being the most stable with a half-life of 3.78 years. Thallium sulphate was used as a rodenticide. Thallium sulphine's conductivity changes with exposure to infrared light, this gives it a use in infrared detectors. Discovered by Sir William Crookes via spectroscopy. Its name comes from the Greek word thallos, which means green twig. Thallium and its compounds are toxic and can cause cancer.

Its compounds are used in rat and ant poisons. Also for detecting infrared radiation.

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