Tellurium. Image copyright: smart-elements.com .
Tellurium (Te) is a silvery-white, metalloid element in group VIA of the periodic table, occurring as heavy-metal tellurides, and extracted as a by-product of copper refining. Tellurium resembles selenium in its chemistry, but is rather more metallic; tellurium (IV) compounds resemble platinum (IV). It is added to metals to make them easier to machine and to lead for greater corrosion resistance; bismuth telluride is used in thermoelectric devices.
|relative atomic mass||127.6|
|melting point||450°C (842°F)|
|boiling point||1,390°C (2,534°F)|