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Tellurium (₅₂Te^127.60)
[13494-80-9]

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Elemental Form


Occasionally found native, tellurium is more often found in combination with other metals. It is silvery-white, lustrous, brittle, and crystalline. (Amorphous tellurium is dark gray to brown and has metal characteristics.) As a p-type semiconductor, it shows greater conductivity in certain directions. Tellurium is used to improve the machinability of copper and stainless steel. When combined with lead, tellurium increases resistance to sulfuric acid while improving strength and hardness.
Melting Point	449.5°C	Boiling Point	989.8°C
Density	6.24g/cm³	Themal Conductivity	0.014cal/cm²/cm/s/°C
Specific Heat @ 25°C	0.047cal/g°C	Heat of Fusion	4.27k-cal/g-atom
Heat of Vaporization	11.9k-cal/g-atom	Atomic Volume	20.5W/D
First Ionization Energy	208K-cal/g-mole	Electronegativity	2.1Pauling's
Covalent Radius	1.36Angstroms	Mohs Hardness @ 20°C	2.0-2.5
Electrical Resistivity	1.6x10⁵µΩ-cm	Crystal Structure	Hexagonal
Modulus of Elasticity	6x10⁶psi	Poisson Ratio	0.33