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Thallium, Tl
Categories: Metal; Nonferrous Metal; Pure Element

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Physical PropertiesOriginal ValueComments
Density 11.85 g/cc
 
Chemical PropertiesOriginal ValueComments
Atomic Mass 204.38331995
Atomic Number 81
Thermal Neutron Cross Section 3.4 barns/atom
X-ray Absorption Edge 0.1447 ÅK
 0.80787 ÅLI
 0.84355 ÅLII
 0.97968 ÅLIII
Electrode Potential -0.336 V
Electronegativity 1.8Pauling
Ionic Radius 0.950 ÅCrystal Ionic Radius for Valence +3
 1.47 ÅCrystal Ionic Radius for Valence +1
Electrochemical Equivalent 2.5 g/A/h
 
Mechanical PropertiesOriginal ValueComments
Hardness, Brinell 2.0
Hardness, Vickers 2.0
Tensile Strength, Ultimate 7.50 MPa
Elongation at Break 40 %in 125 mm
 
Electrical PropertiesOriginal ValueComments
Electrical Resistivity 0.0000150 ohm-cm
Magnetic Susceptibility -2.40e-7cgs/g
Critical Magnetic Field Strength, Oersted 176 - 180
Critical Superconducting Temperature 2.36 - 2.40 K
 
Thermal PropertiesOriginal ValueComments
Heat of Fusion 20.9 J/g
Heat of Vaporization 1231 J/g
CTE, linear 28.0 µm/m-°C
@Temperature 20.0 - 100 °C
Specific Heat Capacity 0.136 J/g-°C
Thermal Conductivity 39.4 W/m-K
Melting Point 304 °C
Boiling Point 1473 °C
 
Component Elements PropertiesOriginal ValueComments
Thallium, Tl 100 %
 
Descriptive Properties
CAS Number7440-28-0

References for this datasheet.

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