Tellurium, Te

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

Density	6.23 g/cc
a Lattice Constant	4.45 Å
c Lattice Constant	5.91 Å
Vapor Pressure	0.001013 bar @Temperature 505 °C
	0.01013 bar @Temperature 617 °C
	0.1013 bar @Temperature 768 °C
	1.013 bar @Temperature 988 °C

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

Mechanical Properties	Original Value	Comments
Hardness, Brinell	25
Tensile Strength, Ultimate	11.0 MPa
Modulus of Elasticity	40.0 GPa
Poissons Ratio	0.33
Shear Modulus	15.16 GPa

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

Thermal Properties	Original Value	Comments
Heat of Fusion	30.6 J/g
Heat of Vaporization	666 J/g
CTE, linear	16.8 µm/m-°C @Temperature 20.0 - 100 °C
Specific Heat Capacity	0.1965 J/g-°C
Thermal Conductivity	1.97 W/m-K	Perpendicular to c-axis
	3.38 W/m-K	Parallel to c-axis
Melting Point	449.5 °C
Boiling Point	988 °C

Optical Properties	Original Value	Comments
Refractive Index	3.30

Component Elements Properties	Original Value	Comments
Tellurium, Te	100 %

Descriptive Properties
CAS Number	13494-80-9

References for this datasheet.

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