52 127.600
Te
Tellurium

Tellurium , Te

Tellurium is a chemical element that has the symbol Te and atomic number 52. A brittle silver-white metalloid which looks like tin, tellurium is chemically related to selenium and sulfur. Tellurium is primarily used in alloys and as a semiconductor.

Tellurium is extremely rare, one of the nine rarest elements on earth. It is in the same chemical family as oxygen, sulfur, selenium, and polonium (the chalcogens).

 

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T2-5001-M
SuperVac© Tellurium 25mm lumps & smaller 99.99990.09
T2-5001-M1

Te 25mm lumps & smaller 99.999% Pure

Tellurium UN3288 6.1 PG III

T2-5004-M

Te 1-2mm pieces 99.999% Pure

Tellurium UN3288 6.1 PG III

T2-10007-P

TeCl4 -8 mesh 99.9% Pure

Tellurium Chloride UN1759 8 PG II

T2-10009-P

TeO2 -100 mesh 99.999% Pure

Tellurium Oxide

T2-10010-P
TeO2 Powder -100 Mesh 99.99% PureTellurium (IV) oxide
T2-10011-P

TeO2 -100 mesh 99% Pure

Tellurium Oxide

T2-10012-P

TeO2 -60 mesh 99.9% Pure

Tellurium Oxide

T2-10013-P

TeO2 D50 : <5um 99.99% Pure

Tellurium (IV) Oxide

T2-10014-P
TeO2 Powder D50 1-2ćm 99.9% PureTellurium (IV) oxide
T2-10015-P
TeO2 Powder 99.99% PureTellurium (IV) oxide
T2-2000-R

Te Rod 3.18mm diameter 99.99 or 99.999% pure

Tellurium

T2-2001-R

Te Rod 6.35mm diameter 99.99 or 99.999% pure

Tellurium

T2-2002-R

Te Rod 12.7mm diameter 99.99 or 99.999% pure

Tellurium

T2-9000-D

Tellurium Te,

Available Purities 99.9%, 99.99% & 99.999%

T2-9002-D

Tellurium oxide, TeO2,

Available Purities 99.9% & 99.99%

T2-9003-D

Tellurium oxide-Magnesium oxide-Zinc oxide TeO2-MgO-ZnO,

Available in various ratios wt% or at%, Purity 99.99%

T2-9004-D

Tellurium oxide-Erbium oxide-Ytterbium oxide TeO2-Er2O3-Yb2O3,

Available in various ratios wt% or at%, Purity 99.99%

T2-9005-D

Tellurium-Germanium-Tin Te-Ge-Sn,

Available in various ratios wt% or at%, Purity 99.995%

T2-9006-D

Tellurium oxide-Magnesium oxide-Zinc oxide-Erbium oxide-Ytterbium oxide

TeO2-MgO-ZnO-Er2O3-Yb2O3, Available in various ratios wt% or at%, Purity 99.99%

T2-9002-D1
TeO2 25.4mm dia. x 6.35mm Tk 99.9% PureSuperVac Tellurium oxide
T2-9002-D2
TeO2 TRG 50.8mm dia. x 3.18mm Tk 99.99% PureTellurium oxide
TE-ST-1-6-5N
Te TRG 25.4mm dia. x 6.35mm Tk 99.999% PureTellurium
TE-ST-2-3-5N
Te TRG 50.8mm dia. x 3mm Tk 99.999% PureTellurium
TE-ST-2-6-5N
Te TRG 50.8mm dia. x 6mm Tk 99.999% PureTellurium
TE-ST-3-3-5N
Te TRG 76.2mm dia. x 3mm Tk 99.999% PureTellurium

When crystalline, tellurium is silvery-white and when it is in its pure state it has a metallic luster. This is a brittle and easily pulverized metalloid. Amorphous tellurium is found by precipitating it from a solution of tellurous or telluric acid (Te(OH)6). However, there is some debate whether this form is really amorphous or made of minute crystals.

Symbol Te
Atomic number 52
No. of naturally occurring isotopes 8
Atomic weight 127.60(+/-0.03)
Electronic configuration [Kr]4d105s25p4
Metal radius (12-coordinate)/pm 160*
Ionic radius/pm M2+ 221
Ionic radius/pm M4+ 97
Ionic radius/pm M6+ 56
Density (25°C)/gcm-3 6.25
Melting point /°C 452
Boiling point /°C 990
ΔHatomization/kJmol-1 192
Electrical resistivity (25°C)/μohm cm 1
Ionization energy/kJmol-1 869
Electronegativity χ 2.1
Band gap Eg/kJmol-1 32.2
Temperature (oC) @Vap. Pressure
10-8 Torr 157
10-6 Torr 207
10-4 Torr 277
Techniques
Electron Beam Poor
Crucible Al2O3 & Quartz
Coil Tungsten
Boat Tungsten & Tantalum
Remarks
Wets w/o alloying. Toxic