Thallium

Analytical testing dots

Thallium is a chemical element with the symbol Tl and atomic number 81. This soft gray malleable poor metal resembles tin but discolors when exposed to air. Approximately 60-70% of produced thallium is used in the electronics industry, and the rest is used in the pharmaceutical industry and in glass manufacturing. It is also used in infrared detectors. Thallium is highly toxic and has been used in rat poisons and insecticides. Since there is evidence it may cause cancer, its use has been reduced or eliminated in many countries.


 

General
Atomic number:   81
Symbol:   Tl
Atomic weight:   204.37
Boiling Point (C):   1457
Melting Point (C):   303
Density:   11.85
heatVapor:   38.8
heatFusion:   1.02
Electrical Conductivity:   0.055
Thermal Conductivity:   0.093
Specific Heat Capacity:   0.031

 

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