Tellurium

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Tellurium Pieces

MATERIAL OVERVIEW

Characteristics: A brittle, mildly toxic, rare, silver-white lustrous metalloid which looks similar to tin. Tellurium is chemically related to selenium and sulfur. It is an easily pulverized metalloid occasionally found in native form, as elemental crystals. Tellurium is far more common in the universe as a whole than on Earth comparable to that of platinum partly due to its high atomic number and also due to the element being lost to space as a gas during the hot-nebular formation of the planet. Insoluble in water, but soluble in sulfuric acid, nitric acid, potassium hydroxide and potassium cyanide solutions. It is a p-type semiconductor and its conductivity is sensitive to light exposure. When in its molten state, tellurium is corrosive to copper, iron and stainless steel.

Derivation: The principal source of tellurium is from anode sludges which are produced during the electrolytic refining of blister copper. It is also a component of dust resulting from blast furnace refining of lead. Treatment of 500 tons of copper ore typically yields one pound of tellurium. Tellurium is produced mainly in the United States, Peru, Japan and Canada.

Tellurium is used to color ceramics; addition into glass and glass fibers for telecommunications; oxidizers in the delay powder for blasting caps; vulcanization of rubber; medical research.

Hazards: Tellurium and tellurium compounds are considered to be mildly toxic and need to be handled with care and not reported as carcinogenic. Toxic by inhalation with a tolerance of 0.1 mg/m3 of air.

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GENERAL PROPERTIES

Symbol:

Te

Atomic Number:

52

Atomic Weight:

127.60

Density:

6.24 gm/cc

Melting Point:

449.5 oC

Boiling Point:

989.8 oC

Thermal Conductivity:

-

Electrical Resistivity:

4.36x10(5) microhm-cm @ 25 oC

Electronegativity:

2.1 Paulings

Specific Heat:

0.0481 Cal/g/K @ 25 oC

Heat of Vaporization:

11.9 K-Cal/gm atom at 989.8 oC

Heat of Fusion:

3.23 Cal/gm mole

TYPICAL ANALYSES - Impurities in ppm

Material / Purity:

4N

5N

Cu <2 2
Mg <2 <1
S <10 -
Si <2 <1
Al - <1
Fe <1 1
Pb <1 -
Se <50 <5
Ni - <1
Ca - <1

TELLURIUM POWDER, SHOT, PELLETS, & INGOT

Material

Purity

Tellurium Lump 3N, 4N, 5N
Tellurium Shot 5N
Telllurium Powder -100 Mesh 3N
Tellurium Powder -200 mesh 3N
Tellurium Powder -325 Mesh 3N, 5N

Powder, shot, pellets, and ingots are packaged to order and sold by the gram or kilogram. Call or This email address is being protected from spambots. You need JavaScript enabled to view it. for additional specifications or custom requirements.

Material Safety Data Sheet - MSDS
Tellurium MSDS
Technical Data Sheets
Tellurium
Tellurium Copper

Understanding Mesh Sizes