Side by side comparison {{Infobox tellurium }} {{Infobox tellurium/sandbox }}
Chemical element with atomic number 52 (Te)
Tellurium, 52 Te Pronunciation (te-LURE -ee-əm ) Appearance silvery lustrous gray (crystalline), brown-black powder (amorphous)
Atomic number (Z ) 52 Group group 16 (chalcogens) Period period 5 Block p-block Electron configuration [Kr ] 4d10 5s2 5p4 Electrons per shell 2, 8, 18, 18, 6 Phase at STP solid Melting point 722.66 K (449.51 °C, 841.12 °F) Boiling point 1261 K (988 °C, 1810 °F) Density (at 20° C) 6.237 g/cm3 [ 3] when liquid (at m.p. ) 5.70 g/cm3 Heat of fusion 17.49 kJ/mol Heat of vaporization 114.1 kJ/mol Molar heat capacity 25.73 J/(mol·K) Vapor pressure
P (Pa)
1
10
100
1 k
10 k
100 k
at T (K)
(775)
(888)
1042
1266
Oxidation states common: −2, +2, +4, +6
−1,? 0,? +1,? +3,? +5[ 4] Electronegativity Pauling scale: 2.1 Ionization energies 1st: 869.3 kJ/mol 2nd: 1790 kJ/mol 3rd: 2698 kJ/mol Atomic radius empirical: 140 pm Covalent radius 138±4 pm Van der Waals radius 206 pm Spectral lines of telluriumNatural occurrence primordial Crystal structure hexagonal [ 5] (hP3 ) Lattice constants a = 445.59 pmc = 592.75 pm (at 20 °C)[ 3] Thermal expansion 19.0× 10−6 /K (at 20 °C)[ a] Thermal conductivity 1.97–3.38 W/(m⋅K) Magnetic ordering diamagnetic [ 6] Molar magnetic susceptibility −39.5× 10−6 cm3 /mol (298 K)[ 7] Young's modulus 43 GPa Shear modulus 16 GPa Bulk modulus 65 GPa Speed of sound thin rod 2610 m/s (at 20 °C) Mohs hardness 2.25 Brinell hardness 180–270 MPa CAS Number 13494-80-9 Naming after Roman Tellus , deity of the Earth Discovery Franz-Joseph Müller von Reichenstein (1782) First isolation Martin Heinrich Klaproth
Category: Tellurium | references
Chemical element with atomic number 52 (Te)
Tellurium, 52 Te Pronunciation (te-LURE -ee-əm ) Appearance silvery lustrous gray (crystalline), brown-black powder (amorphous)
Atomic number (Z ) 52 Group group 16 (chalcogens) Period period 5 Block p-block Electron configuration [Kr ] 4d10 5s2 5p4 Electrons per shell 2, 8, 18, 18, 6 Phase at STP solid Melting point 722.66 K (449.51 °C, 841.12 °F) Boiling point 1261 K (988 °C, 1810 °F) Density (near r.t. ) 6.24 g/cm3 when liquid (at m.p. ) 5.70 g/cm3 Heat of fusion 17.49 kJ/mol Heat of vaporization 114.1 kJ/mol Molar heat capacity 25.73 J/(mol·K) Vapor pressure
P (Pa)
1
10
100
1 k
10 k
100 k
at T (K)
(775)
(888)
1042
1266
Oxidation states common: −2, +2, +4, +6
−1,? 0,? +1,? +3,? +5[ 4] Electronegativity Pauling scale: 2.1 Ionization energies 1st: 869.3 kJ/mol 2nd: 1790 kJ/mol 3rd: 2698 kJ/mol Atomic radius empirical: 140 pm Covalent radius 138±4 pm Van der Waals radius 206 pm Spectral lines of telluriumNatural occurrence primordial Crystal structure trigonal [ 11] Thermal expansion 18 µm/(m⋅K)[ 12] (at r.t. ) Thermal conductivity 1.97–3.38 W/(m⋅K) Magnetic ordering diamagnetic [ 13] Molar magnetic susceptibility −39.5× 10−6 cm3 /mol (298 K)[ 14] Young's modulus 43 GPa Shear modulus 16 GPa Bulk modulus 65 GPa Speed of sound thin rod 2610 m/s (at 20 °C) Mohs hardness 2.25 Brinell hardness 180–270 MPa CAS Number 13494-80-9 Naming after Roman Tellus , deity of the Earth Discovery Franz-Joseph Müller von Reichenstein (1782) First isolation Martin Heinrich Klaproth
Category: Tellurium | references
^ The thermal expansion of tellurium is highly anisotropic : the parameters (at 20 °C) for each crystal axis are αa = 29.6× 10−6 /K, αc = −2.28× 10−6 /K, and αaverage = αV /3 = 19.0× 10−6 /K.[ 3]
References
These references will appear in the article, but this list appears only on this page.
^ "Standard Atomic Weights: Tellurium" . CIAAW . 1969.
^ a b Prohaska, Thomas; Irrgeher, Johanna; Benefield, Jacqueline; Böhlke, John K.; Chesson, Lesley A.; Coplen, Tyler B.; Ding, Tiping; Dunn, Philip J. H.; Gröning, Manfred; Holden, Norman E.; Meijer, Harro A. J. (2022-05-04). "Standard atomic weights of the elements 2021 (IUPAC Technical Report)" . Pure and Applied Chemistry . doi :10.1515/pac-2019-0603 . ISSN 1365-3075 .
^ a b c Arblaster, John W. (2018). Selected Values of the Crystallographic Properties of Elements . Materials Park, Ohio: ASM International. ISBN 978-1-62708-155-9 .
^ a b Greenwood, Norman N. ; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann . p. 28. ISBN 978-0-08-037941-8 .
^ Adenis, C.; Langer, V.; Lindqvist, O. (15 June 1989). "Reinvestigation of the structure of tellurium". Acta Crystallographica Section C Crystal Structure Communications . 45 (6): 941–942. doi :10.1107/S0108270188014453 .
^ Lide, D. R., ed. (2005). "Magnetic susceptibility of the elements and inorganic compounds". CRC Handbook of Chemistry and Physics (PDF) (86th ed.). Boca Raton (FL): CRC Press. ISBN 0-8493-0486-5 .
^ Weast, Robert (1984). CRC, Handbook of Chemistry and Physics . Boca Raton, Florida: Chemical Rubber Company Publishing. pp. E110. ISBN 0-8493-0464-4 .
^ a b Kondev, F. G.; Wang, M.; Huang, W. J.; Naimi, S.; Audi, G. (2021). "The NUBASE2020 evaluation of nuclear properties" (PDF) . Chinese Physics C . 45 (3): 030001. doi :10.1088/1674-1137/abddae .
^ Alessandrello, A.; Arnaboldi, C.; Brofferio, C.; Capelli, S.; Cremonesi, O.; Fiorini, E.; Nucciotti, A.; Pavan, M.; Pessina, G.; Pirro, S.; Previtali, E.; Sisti, M.; Vanzini, M.; Zanotti, L.; Giuliani, A.; Pedretti, M.; Bucci, C.; Pobes, C. (2003). "New limits on naturally occurring electron capture of 123 Te". Physical Review C . 67 : 014323. arXiv :hep-ex/0211015 . Bibcode :2003PhRvC..67a4323A . doi :10.1103/PhysRevC.67.014323 .
^ "Standard Atomic Weights: Tellurium" . CIAAW . 1969.
^ Adenis, C.; Langer, V.; Lindqvist, O. (15 June 1989). "Reinvestigation of the structure of tellurium". Acta Crystallographica Section C Crystal Structure Communications . 45 (6): 941–942. doi :10.1107/S0108270188014453 .
^ Cverna, Fran (2002). "Ch. 2 Thermal Expansion". ASM Ready Reference: Thermal properties of metals (PDF) . ASM International. ISBN 978-0-87170-768-0 .
^ Lide, D. R., ed. (2005). "Magnetic susceptibility of the elements and inorganic compounds". CRC Handbook of Chemistry and Physics (PDF) (86th ed.). Boca Raton (FL): CRC Press. ISBN 0-8493-0486-5 .
^ Weast, Robert (1984). CRC, Handbook of Chemistry and Physics . Boca Raton, Florida: Chemical Rubber Company Publishing. pp. E110. ISBN 0-8493-0464-4 .
^ Alessandrello, A.; Arnaboldi, C.; Brofferio, C.; Capelli, S.; Cremonesi, O.; Fiorini, E.; Nucciotti, A.; Pavan, M.; Pessina, G.; Pirro, S.; Previtali, E.; Sisti, M.; Vanzini, M.; Zanotti, L.; Giuliani, A.; Pedretti, M.; Bucci, C.; Pobes, C. (2003). "New limits on naturally occurring electron capture of 123 Te". Physical Review C . 67 : 014323. arXiv :hep-ex/0211015 . Bibcode :2003PhRvC..67a4323A . doi :10.1103/PhysRevC.67.014323 .