Tellurium Facts

Chemical & Physical Properties

An acrylic cube specially prepared for element collectors containing a sample of pure silicon tellurium

Rasiel Suarez on behalf of Luciteria LLC / Wikimedia Commons / CC BY-SA 4.0 

Periodic Table of the Elements

Tellurium Basic Facts

Symbol: Te

Atomic Number: 52

Atomic Weight: 127.6

Electron Configuration: [Kr] 4d10 5s2 5p4

Element Classification: Semimetallic

Discovery: Franz Joseph Meller von Reichenstein 1782 (Romania)

Name Origin: Latin: tellus (earth).

Tellurium Physical Data

Density (g/cc): 6.24

Melting Point (K): 722.7

Boiling Point (K): 1263

Appearance: silvery-white, brittle semimetal

Atomic Radius (pm): 160

Atomic Volume (cc/mol): 20.5

Covalent Radius (pm): 136

Ionic Radius: 56 (+6e) 211 (-2e)

Specific Heat (@20°C J/g mol): 0.201

Fusion Heat (kJ/mol): 17.91

Evaporation Heat (kJ/mol): 49.8

Pauling Negativity Number: 2.1

First Ionizing Energy (kJ/mol): 869.0

Oxidation States: 6, 4, 2

Lattice Structure: Hexagonal

Lattice Constant (Å): 4.450

Lattice C/A Ratio: 1.330

References: Los Alamos National Laboratory (2001), Crescent Chemical Company (2001), Lange's Handbook of Chemistry (1952), CRC Handbook of Chemistry & Physics (18th Ed.)

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Helmenstine, Anne Marie, Ph.D. "Tellurium Facts." ThoughtCo, Aug. 28, 2020, Helmenstine, Anne Marie, Ph.D. (2020, August 28). Tellurium Facts. Retrieved from Helmenstine, Anne Marie, Ph.D. "Tellurium Facts." ThoughtCo. (accessed June 10, 2023).