Tellurium Elemental Symbol

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Tellure Tellur Tellurio Telúrio Teluro Tellur

Tellurium(Te)atomic and molecular weight, atomic number and elemental symbolTellurium is a Block P, Group 16, Period 5 element. The number of electrons in each of Tellurium's shells is 2, 8, 18, 18, 6 and its electron configuration is [Kr] 4d10 5s2 5p4. In its elemental form tellurium's CAS number is 13494-80-9. Elemental TelluriumThe tellurium atom has a radius of and its Van der Waals radius is Tellurium Bohr ModelTellurium is most commonly sourced from the anode sludges produced as a byproduct of copper refining.Tellurium was first discovered by Franz Muller von Reichenstein in 1782. The name Tellurium originates from the Greek word 'Tellus' meaning Earth.

Tellurium is a p-type semiconductor, and shows greater conductivity in certain directions, depending on alignment of the atoms. It is grown in crystalline form with other elements such as indium telluride. Its conductivity increases slightly with exposure to light which makes many tellurides candidates for solar energy applications. Tellurium improves the machinability of copper and stainless steel, and its addition to lead decreases the corrosive action of sulfuric acid on lead and improves its strength and hardness. High Purity (99.999%) Tellurium Oxide (TeO2) PowderTellurium is used as a basic ingredient in blasting caps, and is added to cast iron for chill control. Tellurium is used in ceramics. Bismuth telluride has been used in thermoelectric devices. High Purity (99.99999%) Tellurium (Te) Sputtering TargetTellurium is available as metal and compounds with purities from 99% to 99.999% (ACS grade to ultra-high purity). Elemental or metallic forms include pellets, rod, wire and granules for evaporation source material purposes. Tellurium nanoparticles and nanopowders provide ultra-high surface area which nanotechnology research and recent experiments demonstrate function to create new and unique properties and benefits. Oxides are available in powder and dense pellet form for such uses as optical coating and thin film applications. Oxides tend to be insoluble. Fluorides are another insoluble form for uses in which oxygen is undesirable such as metallurgy, chemical and physical vapor deposition and in some optical coatings. Tellurium is also available in soluble forms including chlorides, nitrates and acetates. These compounds can be manufactured as solutions at specified stoichiometries.

Safety data for Tellurium and its compounds can vary widely depending on the form. For potential hazard information, toxicity, and road, sea and air transportation limitations, such as DOT Hazard Class, DOT Number, EU Number, NFPA Health rating and RTECS Class, please see the specific material or compound referenced in the Products tab below.

  • Properties
  • Safety Data
  • Products
  • Research
  • Isotopes
  • Other Elements

Tellurium Properties

Symbol: Te Melting Point: 449.51 oC, 841.118 oF, 722.66 K
Atomic Number: 52 Boiling Point: 988 oC, 1810.4 oF, 1261.15 K
Atomic Weight: 127.6 Density: 6247 kg m-3
Element Category: metalloid Liquid Density @ Melting Point: 5.70 g·cm−3
Group, Period, Block: 16 (chalcogens), 5, p Specific Heat: 0.0481 Cal/g/K @ 25°C
    Heat of Vaporization 104.6 kJ mol-1
CHEMICAL STRUCTURE Heat of Fusion 13.5 kJ mol-1
Electrons: 52 Thermal Conductivity: (1.97–3.38) W·m−1·K−1
Protons: 52 Thermal Expansion: N/A
Neutrons: 76 Electrical Resistivity: 4.36x10(5) microhm-cm @ 25°C
Electron Configuration: [Kr]5s24d105p4 Electronegativity: 2.1 Paulings
Atomic Radius: 140 pm Tensile Strength: N/A
Covalent Radius: 138±4 pm Molar Heat Capacity: 25.73 J·mol−1·K−1
Van der Waals radius: 206 pm Young's Modulus: 43 GPa
Oxidation States: 6, 4, -2 Shear Modulus: 16 GPa
Phase: Solid Bulk Modulus: 65 GPa
Crystal Structure: hexagonal[ Poisson Ratio: N/A
Magnetic Ordering: diamagnetic Mohs Hardness: 2.25
1st Ionization Energy: 869.3 kJ mol-1 Vickers Hardness: N/A
2nd Ionization Energy: 1794.64 kJ mol-1 Brinell Hardness: 180 MPa
3rd Ionization Energy: 2697.75 kJ mol-1 Speed of Sound: (20 °C) 2610 m·s−1
CAS Number: 13494-80-9 Abundance in typical human body, by weight: N/A
ChemSpider ID: 4885717 Abundance in typical human body, by atom: N/A
PubChem CID: 6327182 Abundance in universe, by weight: 9 ppb
MDL Number: MFCD00134062 Abundance in universe, by atom: 0.09 ppb
EC Number: 236-813-4 Discovered By: Franz-Joseph Müller von Reichenstein
Beilstein Number: N/A Discovery Date: 1782
SMILES Identifier: [Te]  
InChI Identifier: InChI=1S/Te Other Names: Tellur, Telúrio

Tellurium Products

Metal Forms  •  Compounds  •  Alloys  •  Oxide Forms  •  Organometallic Compounds
Sputtering Targets  •  Nanomaterials  •  Semiconductor Materials •  Isotopes

Metal Forms

Tellurium Balls
Tellurium Bands
Tellurium Bars
Tellurium Bits
Tellurium Board
Tellurium Briquette
Tellurium Capsules
Tellurium Chunk
Tellurium Circle
Tellurium Coil
Tellurium Coins
Tellurium Concentrate
Tellurium Cylinder
Tellurium Disc
Tellurium Dust
Tellurium Flake
Tellurium Flanges
Tellurium Foil
Tellurium Fragments
Tellurium Grain
Tellurium Granules
Tellurium Ingot
Tellurium Lump
Tellurium Mesh
Tellurium Metal
Tellurium Microfoil
Tellurium Microleaf
Tellurium Nugget
Tellurium Particles
Tellurium Parts
Tellurium Pebbles
Tellurium Pellets
Tellurium Pieces
Tellurium Pills
Tellurium Plate
Tellurium Powder
Tellurium Precipitate
Tellurium Prisms
Tellurium Puck
Tellurium Residue
Tellurium Ribbon
Tellurium Rings
Tellurium Rocks
Tellurium Rod
Tellurium Samples
Tellurium Scraps
Tellurium Segments
Tellurium Shaving
Tellurium Sheet
Tellurium Shot
Tellurium Sleeves
Tellurium Slugs
Tellurium Specimens
Tellurium Spheres
Tellurium Spring
Tellurium Strip
Tellurium Tape
Tellurium Tube
Tellurium Wafer
Tellurium Wire
Ultra Thin Tellurium Foil


Ammonium Hexabromotellurate(IV)
Ammonium Hexachlorotellurate(IV)
Calcium Tellurate
Cesium Tellurite
Copper Tellurite
Iron(II) Telluride
Magnesium Tellurate
Manganese Tellurite
Nickel Tellurate
Nickel Tellurite
Potassium Hexabromotellurate(IV)
Potassium Hexachlorotellurate
Potassium Tellurate
Potassium Tellurite
Sodium Tellurate
Sodium Tellurite
Tellurium Bromide (Te2Br)
Tellurium Bromide (TeBr4)
Tellurium Bromide, Ultra Dry (TeBr4)
Tellurium Carbide
Tellurium Chloride TeCl2
Tellurium Chloride TeCl4
Tellurium Chloride Solution
Tellurium Ethoxide
Tellurium Fluoride
Tellurium Iodide
Tellurium Nitrate
Tellurium Nitrate Solution
Tellurium Sulfate Solution

Organometallic Compounds

Diisopropyl Telluride
Tellurium 2-Ethylhexanoate
Sputtering Targets

Aluminum Telluride Sputtering Target
Antimony Telluride Sputtering Target
Arsenic Telluride Sputtering Targete
Bismuth Telluride Sputtering Target
Cadmium Telluride Sputtering Target
Calcium Telluride Sputtering Target
Cerium Telluride Sputtering Target
Cesium Telluride Sputtering Target
Chromium Telluride Sputtering Target
Cobalt Telluride Sputtering Target
Copper Telluride Sputtering Target
Dysprosium Telluride Sputtering Target
Erbium Telluride Sputtering Target
Europium Telluride Sputtering Target
Gadolinium Telluride Sputtering Target
Gallium(II) Telluride Sputtering Target
Gallium(III) Telluride Sputtering Target
Germanium Telluride Sputtering Target
GeSbTe Sputtering Target
Gold Telluride Sputtering Target
Hafnium Telluride Sputtering Target
Holmium Telluride Sputtering Target
Indium Telluride Sputtering Target
Indium(III) Telluride Sputtering Target
Iridium Telluride Sputtering Target
Iron Telluride Sputtering Target
Lanthanum Telluride Sputtering Target
Lead Telluride Sputtering Target
Lithium Telluride Sputtering Target
Lutetium Telluride Sputtering Target
Magnesium Telluride Sputtering Target
Manganese Telluride Sputtering Target
Molybdenum Telluride Sputtering Target
Neodymium Telluride Sputtering Target
Nickel Telluride Sputtering Target
Niobium Telluride Sputtering Target
Osmium Telluride Sputtering Target
Palladium Telluride Sputtering Target
Platinum Telluride Sputtering Target
Praseodymium Telluride Sputtering Target
Rhenium Telluride Sputtering Target
Rhodium Telluride Sputtering Target
Ruthenium Telluride Sputtering Target
Samarium Telluride Sputtering target
Scandium Telluride Sputtering Target
Selenium Telluride Sputtering Target
Silicon Telluride Sputtering Target
Silver Telluride Sputtering Target
Strontium Telluride Sputtering Target
Tantalum Telluride Sputtering Target
Tellurium Oxide Rotatable Sputtering Target
Tellurium Oxide Sputtering Target
Tellurium Rotatable Sputtering Targets
Tellurium Sputtering Target
Terbium Telluride Sputtering Target
Thallium Telluride Sputtering Target
Thorium Telluride Sputtering Target
Thulium Telluride Sputtering Target
Tin Telluride Sputtering Target
Titanium Telluride Sputtering Target
Tungsten Telluride Sputtering Target
Vanadium Telluride Sputtering Target
Ytterbium Telluride Sputtering Target
Yttrium Telluride Sputtering Target
Zinc Telluride Sputtering Target
Zirconium Telluride Sputtering Target


Tellurium Copper Alloy
Bismuth Antimony Tellurium Granule
Bismuth Antimony Tellurium Powder
Bismuth Antimony Tellurium Lump
Bismuth Telluride Alloy Particles
Bismuth Telluride Alloy Powder
Cadmium Indium Tellurium Granules
Cadmium Indium Tellurium Powder
Cadmium Indium Tellurium Lump
Mercury Cadmium Tellurium Granules
Mercury Cadmium Tellurium Powder
Mercury Cadmium Tellurium Lump
Silver Indium Tellurium Granules
Silver Indium Tellurium Powder
Silver Indium Tellurium Lump
Zinc Indium Tellurium Granules
Zinc Indium Tellurium Lump
Zinc Indium Tellurium Powder
Zinc Cadmium Tellurium Granule
Zinc Cadmium Tellurium Lump
Zinc Cadmium Tellurium Powder


Tellurium-122 Isotope
Tellurium-123 Isotope
Tellurium-124 Isotope
Tellurium-125 Isotope
Tellurium-126 Isotope

Crystal/ Semiconductor Materials

Aluminum Telluride
Antimony Telluride
Arsenic Telluride
Arsenic Telluride Lump
Bi2Se3/Sb2Se3 Solid Solution
Bi2Te3/Sb2Te3 Solid Solution
Barium Telluride
Bismuth Antimony Telluride Beads
Bismuth Telluride Single Crystal
Bismuth Telluride
Cadmium Telluride
Cadmium Zinc Telluride (CZT)
Cadmium Tellurite
Calcium Telluride
Cerium Telluride
Cesium Telluride
Chromium Telluride
Cobalt Telluride
Copper Telluride (CuTe)
Copper Telluride (Cu2Te)
Dysprosium Telluride
Erbium Telluride
Europium Telluride
Gadolinium Telluride
Gallium(II) Telluride
Gallium(III) Telluride
Germanium Telluride
Gold Telluride
Gold Ditelluride
Hafnium Telluride
Holmium Telluride
Indium Telluride
Iridium Telluride
Iron Telluride
Lanthanum Telluride
Lead Telluride
Lead Telluride/Antimony Selenide Solid Solution
Lead Telluride/Tin Telluride/Lead Selenide Solid Solution
Lithium Telluride
Lutetium Telluride
Magnesium Telluride
Manganese Telluride (MnTe)
Manganese Telluride (MnTe2)
Mercury Telluride
Molybdenum Telluride
Neodymium Telluride
Nickel Telluride
Niobium Telluride
Osmium Telluride
Palladium Telluride
Platinum Telluride
Praseodymium Telluride
Rhenium Telluride
Rhodium Telluride
Ruthenium Telluride
Samarium Telluride
Scandium Telluride
Selenium Telluride
Silicon Telluride
Silver Antimony Telluride
Silver Telluride
Single Crystal Iron Selenide Telluride
Single Crystal Iron Telluride
Strontium Telluride
Tantalum Telluride
Tellurium Phosphide
Tellurium Sulfide
Terbium Telluride
Thallium Telluride
Thorium Telluride
Thulium Telluride
Tin Telluride
Titanium Telluride
Tungsten Ditelluride
Tungsten Telluride
Vanadium Telluride
Ytterbium Telluride
Yttrium Telluride
Zinc Manganese Telluride
Zinc Telluride
Zirconium Telluride


Cadmium Telluride Quantum Dots
Tellurium Nanoparticles
Tellurium Nanoprisms
Tellurium Oxide Nanopowder

Oxide Forms

Tellurium Oxide
Tellurium Oxide Pellets
Tellurium Oxide Pieces
Tellurium Oxide Powder
Tellurium Oxide Shot
Tellurium Oxide Tablets

Recent Research & Development for Tellurium

  • Emilio Andrea Maugeri, Jörg Neuhausen, Robert Eichler, David Piguet, Dorothea Schumann, Thermochromatography study of volatile tellurium species in various gas atmospheres, Journal of Nuclear Materials, Volume 452, Issues 1–3, September 2014
  • R. Viswanathan, R. Balasubramanian, D. Darwin Albert Raj, M. Sai Baba, T.S. Lakshmi Narasimhan, Vaporization studies on elemental tellurium and selenium by Knudsen effusion mass spectrometry, Journal of Alloys and Compounds, Volume 603, 5 August 2014
  • Aparabal Kumar, P.K. Rawat, P. Banerji, Carrier transport phenomenon and thermoelectric properties in melt-grown tellurium doped n-type Bi0.88Sb0.12 alloy, Materials Science and Engineering: B, Volume 186, August 2014
  • Quansheng Guo, Holger Kleinke, The beneficial influence of tellurium on the thermoelectric properties of Mo3-xFexSb7, Journal of Solid State Chemistry, Volume 215, July 2014
  • Zhuang-hao Zheng, Ping Fan, Jing-ting Luo, Xing-min Cai, Guang-xing Liang, Dong-ping Zhang, Fan Ye, Thermoelectric properties of bismuth antimony tellurium thin films through bilayer annealing prepared by ion beam sputtering deposition, Thin Solid Films, Volume 562, 1 July 2014
  • Javier Fernández-Lodeiro, Marcos Felipe Pinatto-Botelho, Antônio A. Soares-Paulino, Augusto Cesar Gonçalves, Bruno A. Sousa, Cleverson Princival, Alcindo A. Dos Santos, Synthesis and biological properties of selenium- and tellurium-containing dyes, Dyes and Pigments, Available online 20 May 2014
  • Ladislav Koudelka, Ivana Rösslerová, Zdenek Cernošek, Petr Mošner, Lionel Montagne, Bertrand Revel, The structural role of tellurium dioxide in lead borophosphate glasses, Journal of Non-Crystalline Solids, Available online 20 February 2014
  • Songül Fiat, Emin Bacaksiz, Michael Kompitsas, Güven Çankaya, Temperature and tellurium (Te) dependence of electrical characterization and surface properties for a chalcopyrite structured schottky barrier diode, Journal of Alloys and Compounds, Volume 585, 5 February 2014
  • O. Ravi, C. Madhukar Reddy, B. Sudhakar Reddy, B. Deva Prasad Raju, Judd–Ofelt analysis and spectral properties of Dy3+ ions doped niobium containing tellurium calcium zinc borate glasses, Optics Communications, Volume 312, 1 February 2014
  • Martin A. Green, Corrigendum to “Rare materials for photovoltaics: Recent tellurium price fluctuations and availability from copper refining” [Sol. Energy Mater. Sol. Cells 119 (2013) 256–260], Solar Energy Materials and Solar Cells, Volume 121, February 2014
  • Ya-jie ZHENG, Kun-kun CHEN, Leaching kinetics of selenium from selenium–tellurium-rich materials in sodium sulfite solutions, Transactions of Nonferrous Metals Society of China, Volume 24, Issue 2, February 2014
  • Cham Kim, Dong Hwan Kim, Yu Kyung Lee, Jong Tae Kim, Yoon Soo Han, Hoyoung Kim, Study of reaction mechanisms and synthetic manipulations of bismuth tellurium selenide nanomaterials for enhanced thermoelectric performance, Journal of Alloys and Compounds, Volume 584, 25 January 2014
  • M. Aspiala, D. Sukhomlinov, P. Taskinen, Standard Gibbs energy of formation of tellurium dioxide measurement by a solid-oxide electrolyte EMF technique, Thermochimica Acta, Volume 573, 10 December 2013
  • Martin A. Green, Rare materials for photovoltaics: Recent tellurium price fluctuations and availability from copper refining, Solar Energy Materials and Solar Cells, Volume 119, December 2013
  • C. Deviannapoorani, L. Dhivya, S. Ramakumar, Ramaswamy Murugan, Lithium ion transport properties of high conductive tellurium substituted Li7La3Zr2O12 cubic lithium garnets, Journal of Power Sources, Volume 240, 15 October 2013
  • Poornima Singh, Ashok K.S. Chauhan, Ray J. Butcher, Andrew Duthie, Synthesis and structural aspects of 1-naphthyltellurium(IV) trichloride (1), bis(mesityl)tellurium(IV) dichloride (2) and bis(chlorobis(2-thiophenyl)tellurium)oxide (3), Polyhedron, Volume 62, 7 October 2013
  • S. Ukai, Y. Yamazaki, N. Oono, S. Hayashi, Corrosion behavior of 9CrODS steel by simulated fission product cesium and tellurium, Journal of Nuclear Materials, Volume 440, Issues 1–3, September 2013
  • Victor Ignatiev, Alexander Surenkov, Ivan Gnidoy, Alexander Kulakov, Vadim Uglov, Alexander Vasiliev, Mikhail Presniakov, Intergranular tellurium cracking of nickel-based alloys in molten Li, Be, Th, U/F salt mixture, Journal of Nuclear Materials, Volume 440, Issues 1–3, September 2013
  • Michael Woodhouse, Alan Goodrich, Robert Margolis, Ted James, Ramesh Dhere, Tim Gessert, Teresa Barnes, Roderick Eggert, David Albin, Perspectives on the pathways for cadmium telluride photovoltaic module manufacturers to address expected increases in the price for tellurium, Solar Energy Materials and Solar Cells, Volume 115, August 2013
  • Lin-Jer Chen, Tunable photoluminescence emission from Cadmium Tellurium nanorods with ethylenediamine template-assistance at a low temperature, Materials Letters, Volume 101, 15 June 2013

Tellurium Isotopes

Tellurium has six stable isotopes: 120Te, 122Te, 123Te, 124Te, 125Te and 126Te.

Nuclide Symbol Isotopic Mass Half-Life Nuclear Spin
120Te 119.90402 Observationally Stable 0+
122Te 121.9030439 Stable 0+
123Te 122.9042700 Observationally Stable 1/2+
124Te 123.9028179 Stable 0+
125Te 124.9044307 Stable 1/2+
126Te 125.9033117 Stable 0+