Tl-205 Isotope Information and Examples of Enriched Tl-205 Applications:

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

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

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

back to Thallium isotopes list


Tl-205 metal Safety Data Sheet (SDS) - Download pdf file
Download Tl-205 metal SDS

Tl-205 oxide Safety Data Sheet (SDS) - Download pdf file
Download Tl-205 oxide SDS

Properties Of Tl-205 Isotope:

PropertyTL-205
Neutron Number (N)124
Atomic Number / Proton Number (Z)81
Mass Number / Nucleon Number (A)205
Natural Abundance (%)0.7041
Atomic Mass (Da)204.974428
Relative Isotopic Mass204.974428
Spin0.5
Quadrupole Moment0
g-factor (g value)3.2764292
Half-life
Group13
Period6
Electron Configuration Blockp
Melting Point (K)576.6
Boiling Point (K)1730
Specific Heat0.128
Heat of Formation182.2
Thermal Conductivity46.1
Dipole Polarizability 50
Electron Affinity (kJ/mole)0.377
Electronegativity (Pauling scale)1.8
Atomic Radius (pm)171
Covalent Radius (pm)190
VDW Radius (pm)259
Lattice Constant3.46
Crystal StructureHEX
Jmol color#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.

back to Thallium isotopes list