Tellurium, Te

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Tellurium, Te
Categories:	Metal; Nonferrous Metal; Other Engineering Material; Semiconductor; Pure Element
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Physical Properties	Metric	English	Comments

Density	6.23 g/cc	0.225 lb/in³
a Lattice Constant	4.45 Å	4.45 Å
c Lattice Constant	5.91 Å	5.91 Å
Vapor Pressure	0.001013 bar @Temperature 505 °C	0.7598 torr @Temperature 941 °F
	0.01013 bar @Temperature 617 °C	7.598 torr @Temperature 1140 °F
	0.1013 bar @Temperature 768 °C	75.98 torr @Temperature 1410 °F
	1.013 bar @Temperature 988 °C	759.8 torr @Temperature 1810 °F

Chemical Properties	Metric	English	Comments
Atomic Mass	127.60	127.60	1995
Atomic Number	52	52
Thermal Neutron Cross Section	4.7 barns/atom	4.7 barns/atom
X-ray Absorption Edge	0.38972 Å	0.38972 Å	K
	2.50272 Å	2.50272 Å	L_I
	2.68253 Å	2.68253 Å	L_II
	2.85162 Å	2.85162 Å	L_III
Electronegativity	2.1	2.1	Pauling
Ionic Radius	0.560 Å	0.560 Å	Crystal Ionic Radius for Valence +6
	0.700 Å	0.700 Å	Crystal Ionic Radius for Valence +4
	0.820 Å	0.820 Å	Crystal Ionic Radius for Valence +1
	2.11 Å	2.11 Å	Crystal Ionic Radius for Valence -2
	2.50 Å	2.50 Å	Crystal Ionic Radius for Valence -1
Electrochemical Equivalent	0.99 g/A/h	0.99 g/A/h

Mechanical Properties	Metric	English	Comments
Hardness, Brinell	25	25
Tensile Strength, Ultimate	11.0 MPa	1600 psi
Modulus of Elasticity	40.0 GPa	5800 ksi
Poissons Ratio	0.33	0.33
Shear Modulus	15.16 GPa	2199 ksi

Electrical Properties	Metric	English	Comments
Electrical Resistivity	0.000150 ohm-cm	0.000150 ohm-cm
Magnetic Susceptibility	-0.0000395	-0.0000395	Atomic (cgs)
	-3.10e-7	-3.10e-7	cgs/g
Critical Superconducting Temperature	2.40 - 5.10 K @Pressure 3800 - 5500 MPa	2.40 - 5.10 K @Pressure 551000 - 798000 psi	Te II
	4.10 - 4.50 K @Pressure 5300 - 6200 MPa	4.10 - 4.50 K @Pressure 769000 - 899000 psi	Te III
	>= 4.72 K @Pressure 6300 - 8000 MPa	>= 4.72 K @Pressure 914000 - 1.16e+6 psi	Te IV
Band Gap	0.33 eV	0.33 eV
Electron Mobility, cm²/V-s	1700	1700
Hole Mobility, cm²/V-s	1200	1200

Thermal Properties	Metric	English	Comments
Heat of Fusion	30.6 J/g	13.2 BTU/lb
Heat of Vaporization	666 J/g	287 BTU/lb
CTE, linear	16.8 µm/m-°C @Temperature 20.0 - 100 °C	9.33 µin/in-°F @Temperature 68.0 - 212 °F
Specific Heat Capacity	0.1965 J/g-°C	0.04696 BTU/lb-°F
Thermal Conductivity	1.97 W/m-K	13.7 BTU-in/hr-ft²-°F	Perpendicular to c-axis
	3.38 W/m-K	23.5 BTU-in/hr-ft²-°F	Parallel to c-axis
Melting Point	449.5 °C	841.1 °F
Boiling Point	988 °C	1810 °F

Optical Properties	Metric	English	Comments
Refractive Index	3.30	3.30

Component Elements Properties	Metric	English	Comments
Tellurium, Te	100 %	100 %

Descriptive Properties
CAS Number	13494-80-9

References for this datasheet.

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