Thallium

Definition of Thallium

Thal´li`um
n.1.(Chem.) A rare metallic element of the aluminium group found in some minerals, as certain pyrites, and also in the lead-chamber deposit in the manufacture of sulphuric acid. It is isolated as a heavy, soft, bluish white metal, easily oxidized in moist air, but preserved by keeping under water. Symbol Tl. Atomic weight 203.7.

Related Words

atomic number 81, blende, metal, metallic element, sphalerite, Tl, zinc blende
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