A.A.Baikov Institute of Metallurgy and Materials Science

DATABASE ON PROPERTIES OF CHEMICAL ELEMENTS
Properties of element Np
PropertyValueCommentsReferences
ΔH interface M in O (Miedema)-1029
 13823
ΔH interface O in M (Miedema)-515
 13823
Atomic concentration5,2(1023 m-3)  13823
Atomic electron scattering factor at 0.53,61 13823
Atomic environment number (Villars, Daams)7  13823
Atomic number start counting left top, left-right sequence93  13823
Atomic weight237,048(10-3 kg)  13823
Boiling temperature4175
 13823
Charge nuclear effective (Clementi)9 13823
Compression modulus0,68(GPa)  13823
Conductivity thermal6,3
 13823
Debye temperature187,5
 13823
Density20250
 13823
Distance from core electron (Schubert)1(A) 13823
Distance from valence electron (Schubert)1,63(A) 13823
Electrochemical weight equivalent1(mg*K-1)  13823
Electron affinity50
 13823
Electronegativity (Alfred-Rochow)1,22 13823
Electronegativity (Martynov&Batsanov)1,3 13823
Electronegativity (Pauling)1,4 13823
Electronegativity absolute3,5 13823
Energy cohesive (Brewer)4,2
 13823
Energy of ionization first530
 13823
Energy of ionization second1139
 13823
Energy of ionization third1772
 13823
Enthalpy of atomization457
 13823
Enthalpy of melting3,2
 18453
Enthalpy of melting9,46
 13823
Enthalpy of vaporization336,6
 13823
Entropy of solid50
 13823
Entropy of solid50,45
 18453
Group number3 13823
Linear thermal expansion coefficient18(10-6*K-1) 13823
Magnetic frequency of nuclei11,25 13823
Magnetic resonance1(MHz)  13823
Mass attenuation coefficient for MoKα120(cm2*g-1)  13823
Melting temperature913
 13823
Mendeleev chemists sequence32  13823
Mendeleev d-t start left24  13823
Mendeleev d-t start right79  13823
Mendeleev H d-t start left23  13823
Mendeleev H d-t start right80  13823
Mendeleev H t-d start left24  13823
Mendeleev H t-d start right81  13823
Mendeleev Pettifor44  13823
Mendeleev Pettifor regular43  13823
Mendeleev t-d start left25  13823
Mendeleev t-d start right80  13823
Molar heat capacity29,62
 13823
Molar heat capacity36
 18453
Molar heat capacity40
 18453
Moment nuclear magnetic1(mu) 13823
Nuclear charge effective (Slater)1,8 13823
Oxidation state first 3 13823
Periodic number start counting bottom right, right-left sequence11  13823
Periodic number start counting left bottom, left-right sequence7  13823
Periodic number start counting top right, right-left sequence97  13823
Quantum number7 13823
Radii covalent150
 13823
Radii metal (Waber)1,555(A) 13823
Radii pseudo-potential (Zunger)4,93(a.u.) 13823
Resistivity electrical122(10-8 Ohm*m)  13823
Spectral lines no114 13823
Spin nuclei3(h) 13823
Thermal neutron capture cross section180(barns) 13823
Valence electron number3 13823
Volume of atom (Villars, Daams)1,922(10-2 nm3)  13823
PropertyC.N.Radii ionic (Shannon)CommentsReferences
Np+261,100 Å13826
Np+361,010 Å13826
Np+460,870 Å13826
Np+480,980 Å13826
Np+560,750 Å13826
Np+660,720 Å13826
Np+760,710 Å13826
PropertyValueCommentsReferences
Radii ionic (Bokii & Belov)
Np+31,020 Å 13824
Np+40,880 Å 13824
Radii ionic (Yagoda)
Np+31,040 Å 13824
Np+40,910 Å 13824
Np+50,820 Å 13824
Np+60,760 Å 13824