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Elmet Technologies

Thulium, Tm
Categories: Metal; Nonferrous Metal; Pure Element

Material Notes: Physical Form: Silver Metal; Hexagonal

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Physical PropertiesMetricEnglishComments
Density 9.33 g/cc0.337 lb/in³
 
Chemical PropertiesMetricEnglishComments
Atomic Mass 168.9342168.9342168.93421 - 1995
Atomic Number 6969
X-ray Absorption Edge 0.2089 Å0.2089 ÅK
 1.22708 Å1.22708 ÅLI
 1.28856 Å1.28856 ÅLII
 1.4314 Å1.4314 ÅLIII
Electronegativity 1.251.25Pauling
Ionic Radius 0.870 Å0.870 ÅCrystal Ionic Radius for Valence +3
 
Mechanical PropertiesMetricEnglishComments
Hardness, Vickers 4848
Tensile Strength, Ultimate 140 MPa20300 psi
Tensile Strength, Yield 60.0 MPa8700 psi
Elongation at Break 12 %12 %
Tensile Modulus 74.0 GPa10700 ksi
Bulk Modulus 44.5 GPa6450 ksi
Poissons Ratio 0.2130.213
Shear Modulus 30.5 GPa4420 ksi
 
Electrical PropertiesMetricEnglishComments
Electrical Resistivity 0.0000676 ohm-cm0.0000676 ohm-cm
Magnetic Susceptibility 0.0001540.000154cgs/g
Curie Temperature -241 °C-402 °F
 
Thermal PropertiesMetricEnglishComments
Heat of Fusion 110 J/g47.3 BTU/lb
CTE, linear 8.80 µm/m-°C4.89 µin/in-°Falong a-axis
 22.2 µm/m-°C12.3 µin/in-°Falong c-axis
 13.3 µm/m-°C
@Temperature 20.0 °C
7.39 µin/in-°F
@Temperature 68.0 °F
Bulk
Specific Heat Capacity 0.123 J/g-°C0.0294 BTU/lb-°FGas
 0.160 J/g-°C0.0382 BTU/lb-°F
Thermal Conductivity 16.9 W/m-K117 BTU-in/hr-ft²-°FPolycrystalline Sample
Melting Point 1530 - 1560 °C2790 - 2840 °F
Boiling Point 1950 °C3540 °F
Heat of Formation 0.000 kJ/mol0.000 kJ/molCrystal
 232.2 kJ/mol232.2 kJ/molGas
 
Component Elements PropertiesMetricEnglishComments
Thulium, Tm 100 %100 %
 
Descriptive Properties
CAS Number7440-30-4
SolubilitySoluble in diluted Acid

References for this datasheet.

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