Alphabetical Index
Browse by Elements
Keyword Search
ASTM Electrolytes
Macro Etchants
Micro Etchants
Named Etchants
New Etchants
Al and Al Alloys
Cu and Cu Alloys
Fe and Fe Alloys
Ni and Ni Alloys
Carbide Etchants
Fluoride Etchants
Nitride Etchants
Other Etchants
Oxide Etchants
Phosphide Etchants
Single Crystal Etchants
Thin Film Etchants
Wafer Etchants
Help
Home
Tellurium
Symbol: Te
Atomic Number: 52
Atomic Weight: 127.6
Element Classification: Semimetallic
Discovered By: Franz Joseph Meller von Reichenstein
Discovery Date: 1782 (Romania)
Name Origin: Latin: tellus (earth).
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
Thermal Conductivity (@25°C W/m K):
Debye Temperature (°K): n/a
Pauling Negativity Number: 2.1
First Ionizing Energy (kJ/mol): 869.0
Oxidation States: 6, 4, 2
Electronic Configuration: [Kr] 4d10 5s2 5p4
Lattice Structure: Hexagonal (HEX)
Lattice Constant (Å): 4.450
Lattice C/A Ratio: 1.330
Mineral Hardness [no units]: 2.25
Brinell Hardness [/MN m-2]: 180