eFunda: General Information on Element Tantalum
engineering fundamentals Element Information: Tantalum
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Tantalum
73
Ta
180.948
Atomic Number 73
Atomic Weight 180.948
Electron Config. 2-2-6-2-6-10-2-6-10-14-2-6-3-0-2
Electron configuration order: 1s-2s-2p-3s-3p-3d-4s-4p-4d-4f-5s-5p-5d-5f-6s-6p-6d-7s

Mechanical Properties Conditions
Phase Temp. (K) Pressure (Pa)
Density 16400 kg/m3 Solid  298.15 
Modulus of Elasticity 186.159 GPa Solid  293.15   
Poisson Ratio 0.34 Solid     
Thermal Expansion Coefficient 6.300 /K Solid  298.15  

Electrical Properties Conditions
Temp. (K) Note
Electrical Resistivity 1.245 W-m 298.15  

Thermal Properties Conditions
Temp. (K) Pressure (Pa)
Melting Temperature 3290.15 K   101325 
Boiling Temperature 5731.15 K   101325 
Critical Temperature 16500 K    
Fusion Enthalpy 202.1 J/g 101325 
Heat Capacity 140 J/kg-K 298.149993896 more... 100000 
Thermal Conductivity 57.5 W/m-K 300 101325 

 
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