A.A.Baikov Institute of Metallurgy and Materials Science

DATABASE ON PROPERTIES OF CHEMICAL ELEMENTS
Properties of element Se
PropertyValueCommentsReferences
ΔH interface M in O (Miedema)-255
 13823
ΔH interface O in M (Miedema)-113
 13823
Atomic concentration3,6(1023 m-3)  13823
Atomic electron scattering factor at 0.51,65 13823
Atomic environment number (Villars, Daams)2  13823
Atomic number start counting left top, left-right sequence34  13823
Atomic weight78,96(10-3 kg)  13823
Boiling temperature958,1
 13823
Boiling temperature958,2
 19178
Charge nuclear effective (Clementi)8,29 13823
Compression modulus0,091(GPa)  13823
Conductivity electrical12,5(104 Ohm-1*cm-1) 13823
Conductivity thermal20,4
 13823
Debye temperature90
 13823
Density4260


amorphous17063
Density4790
hexagonal13823
Density4800
hexagonal17062
Distance from core electron (Schubert)1,04(A) 13823
Distance from valence electron (Schubert)1,77(A) 13823
Electrochemical weight equivalent0,13637(mg*K-1)  13823
Electron affinity195
 13823
Electronegativity (Alfred-Rochow)2,48 13823
Electronegativity (Martynov&Batsanov)2,54 13823
Electronegativity (Pauling)2,4 13823
Electronegativity absolute5,89 13823
Energy cohesive (Brewer)2,25
 13823
Energy of ionization first940,9
 13823
Energy of ionization second2045
 13823
Energy of ionization third2974
 13823
Enthalpy of atomization227,1
 13823
Enthalpy of melting37,7
 13823
Enthalpy of vaporization14
 19178
Enthalpy of vaporization26,3
 19178
Enthalpy of vaporization90
 13823
Enthalpy of vaporization95,5
 19178
Entropy of solid42,43602
 13823
Group number6 13823
Hardness (Brinell)736[MPa] 13823
Linear thermal expansion coefficient34(10-6*K-1) 17062
Linear thermal expansion coefficient45,8(10-6*K-1) 13823
Magnetic frequency of nuclei19,092 13823
Magnetic resonance8,118(MHz)  13823
Magnetic susceptibility0,000000004(m3*kg-1) 13823
Mass attenuation coefficient CrKα281(cm2*g-1)  13823
Mass attenuation coefficient FeKα175(cm2*g-1) 13823
Mass attenuation coefficient for CuKα91,4(cm2*g-1)  13823
Mass attenuation coefficient for MoKα74,7(cm2*g-1)  13823
Melting temperature308
amorphous17062
Melting temperature417
monoclinic17062
Melting temperature490
hexagonal17062
Mendeleev chemists sequence96  13823
Mendeleev d-t start left90  13823
Mendeleev d-t start right14  13823
Mendeleev H d-t start left89  13823
Mendeleev H d-t start right15  13823
Mendeleev H t-d start left89  13823
Mendeleev H t-d start right15  13823
Mendeleev Pettifor93  13823
Mendeleev Pettifor regular93  13823
Mendeleev t-d start left90  13823
Mendeleev t-d start right14  13823
Molar heat capacity25,363
 13823
Moment nuclear magnetic0,533(mu) 13823
Nuclear charge effective (Slater)6,95 13823
Oxidation state first -2 13823
Periodic number start counting bottom right, right-left sequence70  13823
Periodic number start counting left bottom, left-right sequence83  13823
Periodic number start counting top right, right-left sequence21  13823
Poisson's ratio0,447 13823
Quantum number4 13823
Radii covalent117
 13823
Radii metal (Waber)1,4(A) 13823
Radii pseudo-potential (Zunger)1,285(a.u.) 13823
Resistivity electrical1000000(10-8 Ohm*m)  13823
Sound velocity3350(m*s-1) 13823
Spectral lines no92 13823
Spin nuclei0,5(h) 13823
Thermal neutron capture cross section11,7(barns) 13823
Valence electron number6 13823
Vapour pressure at Tm0,695(N*m-2) 13823
Volume of atom (Villars, Daams)2,727(10-2 nm3)  13823
Work function4,7(eV)  13823
Young's modulus58(GPa)  13823
PropertyC.N.Radii ionic (Shannon)CommentsReferences
Se-261,980 Å 13826
Se+460,500 Å 13826
Se+640,280 Å 13826
Se+660,420 Å 13826
PropertyValueCommentsReferences
Radii ionic (Bokii & Belov)
Se-21,930 Å 13824
Se+40,690 Å 13824
Se+60,350 Å 13824
Radii ionic (Goldsmidt)
Se-21,910 Å 13824
Se+60,350 Å 13824
Radii ionic (Pauling)
Se-21,980 Å 13824
Se+60,420 Å 13824
Radii ionic (Yagoda)
Se+40,470 Å 13824
Se+60,410 Å 13824