Properties of Ta:

Property Name Value Unit Comments Reference
ΔH interface M in O (Miedema) -1023 (kJmol-1) 13823
ΔH interface O in M (Miedema) -409 (kJmol-1) 13823
ΔH interface S in M -177 (kJmol-1) 13823
Δinterface M in S (Miedema) -376 (kJmol-1) 13823
γ-free electron to specific heat 5,9 (mJmol-1K-2) 13823
Atomic concentration 5,55 (1023 m-3) 13823
Atomic electron scattering factor at 0.5 3 13823
Atomic environment number (Villars, Daams) 14 13823
Atomic number start counting left top, left-right sequence 73 13823
Atomic weight 180,948 (10-3 kg) 13823
Boiling temperature 5698 (K) 13823
Boiling temperature 5762 (K) 23615
Boiling temperature 5693 (K) 19178
Boiling temperature 5833 (K) 19178
Boiling temperature 5731 (K) 19178
Bulk modulus 196,3 (GPa) 13823
Charge nuclear effective (Clementi) 9,53 13823
Chemical potential (Miedema) 4,05 13823
Compression modulus 2 (GPa) 13823
Conductivity electrical 7,15 (104 Ohm-1cm-1) 13823
Conductivity thermal 57,5 (Jmol-1K-1) 13823
Debye temperature 240 (K) 13823
Density 16654 (kgm-3) 13823
Density 16400 (kgm-3) 20518
Distance to core electron (Schubert) 0,95 (A) 13823
Distance to valence electron (Schubert) 1,7 (A) 13823
Electrochemical weight equivalent 0,37488 (mgK-1) 13823
Electron affinity 14 (kJmol-1) 13823
Electronegativity (Alfred-Rochow) 1,33 13823
Electronegativity (Martynov&Batsanov) 1,94 13823
Electronegativity (Pauling) 1,5 13823
Electronegativity absolute 4,11 13823
Energy cohesive (Brewer) 8,1 (Jmol-1) 13823
Energy of ionization (first) 761,3 (kJmol-1) 13823
Energy of ionization (second) 1563 (kJmol-1) 13823
Energy of ionization (third) 2123 (kJmol-1) 13823
Enthalpy of atomization 782 (kJmol-1) 13823
Enthalpy of melting 24,7 (kJmol-1) 13823
Enthalpy of surface (Miedema) 217 (kJmol-1) 13823
Enthalpy of vacancies (Miedema) 225 (kJmol-1) 13823
Enthalpy of vaporization 753 (kJmol-1) 19178
Enthalpy of vaporization 733 (kJmol-1) 19178
Enthalpy of vaporization 737 (kJmol-1) 19178
Enthalpy of vaporization 758,22 (kJmol-1) 13823
Enthalpy of vaporization 781 (kJmol-1) 23615
Entropy of solid 41,556 (Jmol-1K-1) 23615
Entropy of solid 41,44932 (Jmol-1K-1) 13823
Group number 5 13823
Hardness (Brinell) 3430 [MPa] 13823
Linear thermal expansion coefficient 6,3 (10-6K-1) 13823
Magnetic frequency of nuclei 11,97 13823
Magnetic resonance 5,096 (MHz) 13823
Magnetic susceptibility 0,0000000107 (m3kg-1) 13823
Mass attenuation coefficient FeKα 297 (cm2g-1) 13823
Mass attenuation coefficient for CrKα 444 (cm2g-1) 13823
Mass attenuation coefficient for CuKα 166 (cm2g-1) 13823
Mass attenuation coefficient for MoKα 95,4 (cm2g-1) 13823
Melting temperature 3273 (K) 13823
Mendeleev chemists sequence 57 13823
Mendeleev d-t start left 49 13823
Mendeleev d-t start right 53 13823
Mendeleev H d-t start left 48 13823
Mendeleev H d-t start right 54 13823
Mendeleev H t-d start left 50 13823
Mendeleev H t-d start right 56 13823
Mendeleev Pettifor 52 13823
Mendeleev Pettifor regular 52 13823
Mendeleev t-d start left 51 13823
Mendeleev t-d start right 55 13823
Modulus of rigidity 69,2 (GPa) 13823
Molar heat capacity 25,36 (Jmol-1K-1) 13823
Molar heat capacity 25,302 (Jmol-1K-1) 23615
Moment nuclear magnetic 2,34 (mu) 13823
Nuclear charge effective (Slater) 3,3 13823
nWS^(1/3) (Miedema) 1,63 (a.u.-1/3) 13823
Oxidation state (first) 3 13823
Periodic number start counting bottom right, right-left sequence 31 13823
Periodic number start counting left bottom, left-right sequence 36 13823
Periodic number start counting top right, right-left sequence 68 13823
Poisson's ratio 0,342 13823
Quantum number 6 13823
Radii covalent 134 (pm) 13823
Radii metal (Waber) 1,467 (A) 13823
Radii pseudo-potential (Zunger) 2,79 13823
Resistivity electrical 12,45 (10-8 Ohmm) 13823
Sound velocity 3400 (ms-1) 13823
Spectral lines no 613 13823
Spin nuclei 3,5 (h) 13823
Surface tension at Tm 3150 (mJm-2) 13823
Thermal neutron capture cross section 20,5 (barns) 13823
V^(2/3) (Miedema) 4,89 (cm2) 13823
Valence electron number 5 13823
Vapour pressure at Tm 0,776 (Nm-2) 13823
Volume of atom (Villars, Daams) 1,801 (10-2 nm3) 13823
Work function 4,1 (eV) 13823
Young's modulus 185,7 (GPa) 13823

Radii Ionic properties of Ta:

Property Name Charge CN Value Unit Comments Reference
Radii ionic (Bokii & Belov) 5 0,66 (Å) 13824
Radii ionic (Yagoda) 4 0,77 (Å) 13824
Radii ionic (Yagoda) 5 0,7 (Å) 13824
Radii ionic (Shannon) 3 6 0,72 (Å) 13826
Radii ionic (Shannon) 4 6 0,68 (Å) 13826
Radii ionic (Shannon) 5 6 0,64 (Å) 13826
Radii ionic (Shannon) 5 7 0,69 (Å) 13826
Radii ionic (Shannon) 5 8 0,74 (Å) 13826