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Niobium

Density 8.57 g/cm3
Thermal Conductivity @ 25oC 0.125 cal/(s/cm/oC)
Specific Heat @ 25oC 0.065 cal/g
Heat of Fusion 6.4 kcal/g-atom
Latent Heat of Fusion kcal/g-mole
Heat of Vaporization cal/g
Latent Heat of Vaporization kcal/g-atom
Atomic Volume 10.8 W/D
First Ionizaton Energy 156 kcal/g-mole
Electronegativity 1.6 Paulings
Covalent Radius 1.34 Angstroms
Brinell Hardness  
Mohs Hardness @ 20oC  
Vickers Hardness @ 20oC  
Linear CTE @ 20oC 7.1 x 10-6
Electrical Resistivity @ 20oC 15.22 mohm/cm
Electrical Conductance mohm-1
Crystal Structure Cubic, body centered
Curie Temperature oC
Modulus of Elasticity kg/mm2
Youngs Modulus psi
Thermal Neutron Cross-section barnes/atom
Magnetic Moment magnetons
Magnetic Succeptibility @ 18oC x 10-6 cgs
Tensile Strength 50000 psi
Yield Strength psi
Electron Work Function  
Vapor Pressure @ 25 oC m
Poisson Ratio  
Shear Modulus  
Critical Temperature oC
Transformation Temperature oC
Critical Pressure atm
Standard Electrode Potential Volts
Ionization Potential eV
Compressability x 10-6 /atm
Thermionic Work Function 4.01 eV
Debye Temperature oK
Yield Point psi
Hall Consatant x 10-13 (ohm/cm)/gauss
Lattice Constant 10-8 cm