Home 81 Tl Thallium back to the periodic table

Atomic number   81
Symbol   Tl
Atomic weight   204.3833
Density [g/cm3]   11.58
Melting point [°C]   303.5
Boiling point [°C]   1457
1st Ionization energy [eV]   6.108
Electronic configuration   [Xe] 4f14 5d10  6s2 6p
Oxidation number (most stable)   3, 1
Atomic radius [pm]   170.4 (a)
Ionic radius [pm]   150 (1+)
Abundance in crustal rocks [ppm]   0.7
Origin of the name   (greek) thallos = green twig (after its green spectral line)
Discovery   1861 by the English Crookes
Uses   limited technical significance, among other things in some babbitt metals as well as for the production of anodes for the copper electrolysis.

This page in German - Diese Seite in Deutsch
© 2004 Büro für angewandte Mineralogie · Dr. Stephan Rudolph · D-47918 Tönisvorst
These recommendations are believed to be correct. However, no guarantee of their accuracy is given. Therefore, purchasers shall make their own tests to determine suitability for their use. These products are offered for industrial and related uses (e.g. research and development) only. However the user must take the necessary precautions appropriate for products containing chemicals. This description does not imply the absence of any patents, the responsibility whatsoever solely rests with the user.