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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.
|Property Name||Property Value||Property Name||Property Value|
|Atomic Code||(52Te127.60)||Atomic Volume||20.5W/D|
|CAS #||13494-80-9||First Ionization Energy||208K-cal/g-mole|
|Melting Point||449.5°C||Covalent Radius||1.36Angstroms|
|Boiling Point||989.8°C||Mohs Hardness @ 20°C||2.0-2.5|
|Themal Conductivity||0.014cal/cm2/cm/s/°C||Crystal Structure||Hexagonal|
|Specific Heat @ 25°C||0.047cal/g°C||Modulus of Elasticity||6x106psi|
|Heat of Fusion||4.27k-cal/g-atom||Poisson Ratio||0.33|
|Heat of Vaporization||11.9k-cal/g-atom|