Tellurium Properties, Molecular Formula, Applications - WorldOfChemicals

Tellurium Properties

Tellurium

Description

 

Tellurium is a metalloid which looks similar to tin. It is chemically related to selenium and sulfur. It was discovered in Transylvania in 1782 by Franz-Joseph Müller von Reichenstein in a mineral containing gold and tellurium. Martin Heinrich Klaproth named the new element in 1798 after the Latin word for "earth", tellus. It is primarily used in alloys, foremost in steel and copper to improve machinability. Applications in solar panels and as a semiconductor material also consume a considerable fraction of tellurium production. It is also used to color ceramics. The strong increase in optical refraction upon the addition of selenides and tellurides into glass is used in the production of glass fibers for telecommunications. These chalcogenide glasses are widely used. Rubber can be vulcanized with tellurium instead of sulfur or selenium. The rubber produced in this way shows improved heat resistance.

Chemical Properties

Appearance Silver-White Solid
Atomic Number 52
Atomic Weight 127.60 g/mol
Block p
Boiling Point 988 °C
CAS Number 13494-80-9
Class 6.1
Crystal Structure Hexagonal
Density 6.24 g/cm3
EINECS Number 236-813-4
Electron Configuration 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p4
Group 16
Ionization Energy 869.3 KJ/mol
Melting Point 449.51 °C
NFPA 704 H-1,F-1,R-0,C-NA
Oxidation State 6,5,4,2,-2
PG 3
Period 5
RTECS Number WY2625000
Symbol Te
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