Side by side comparison {{Infobox aluminium }} {{Infobox aluminium/sandbox }}
Chemical element with atomic number 13 (Al)
Aluminium, 13 Al Pronunciation Alternative name Aluminum (U.S., Canada) Appearance Silvery gray metallic
Atomic number (Z ) 13 Group group 13 (boron group) Period period 3 Block p-block Electron configuration [Ne ] 3s2 3p1 Electrons per shell 2, 8, 3 Phase at STP solid Melting point 933.47 K (660.32 °C, 1220.58 °F) Boiling point 2743[ 4] K (2470 °C, 4478 °F) Density (at 20 °C) 2.699 g/cm3 [ 5] when liquid (at m.p. ) 2.375 g/cm3 Heat of fusion 10.71 kJ/mol Heat of vaporization 284 kJ/mol Molar heat capacity 24.20 J/(mol·K) Vapor pressure
P (Pa)
1
10
100
1 k
10 k
100 k
at T (K)
1482
1632
1817
2054
2364
2790
Oxidation states common: +3
−2,? −1,? 0,[ 6] +1,[ 7] [ 8] +2[ 9] Electronegativity Pauling scale: 1.61 Ionization energies 1st: 577.5 kJ/mol 2nd: 1816.7 kJ/mol 3rd: 2744.8 kJ/mol (more ) Atomic radius empirical: 143 pm Covalent radius 121±4 pm Van der Waals radius 184 pm Spectral lines of aluminiumNatural occurrence primordial Crystal structure face-centered cubic (fcc) (cF4 ) Lattice constant a = 404.93 pm (at 20 °C)[ 5] Thermal expansion 22.87× 10−6 /K (at 20 °C)[ 5] Thermal conductivity 237 W/(m⋅K) Electrical resistivity 26.5 nΩ⋅m (at 20 °C) Magnetic ordering paramagnetic [ 10] Molar magnetic susceptibility +16.5× 10−6 cm3 /molYoung's modulus 70 GPa Shear modulus 26 GPa Bulk modulus 76 GPa Speed of sound thin rod (rolled) 5000 m/s (at r.t. ) Poisson ratio 0.35 Mohs hardness 2.75 Vickers hardness 160–350 MPa Brinell hardness 160–550 MPa CAS Number 7429-90-5 Naming from alumine , obsolete name for alumina Prediction Antoine Lavoisier (1782) Discovery Hans Christian Ørsted (1824) Named by Humphry Davy (1812[ a] )
Category: Aluminium | references
Chemical element with atomic number 13 (Al)
Aluminium, 13 Al Pronunciation Alternative name aluminum (U.S., Canada) Appearance silvery gray metallic
Atomic number (Z ) 13 Group group 13 (boron group) Period period 3 Block p-block Electron configuration [Ne ] 3s2 3p1 Electrons per shell 2, 8, 3 Phase at STP solid Melting point 933.47 K (660.32 °C, 1220.58 °F) Boiling point 2743 K (2470 °C, 4478 °F) Density (near r.t. ) 2.70 g/cm3 when liquid (at m.p. ) 2.375 g/cm3 Heat of fusion 10.71 kJ/mol Heat of vaporization 284 kJ/mol Molar heat capacity 24.20 J/(mol·K) Vapor pressure
P (Pa)
1
10
100
1 k
10 k
100 k
at T (K)
1482
1632
1817
2054
2364
2790
Oxidation states common: +3
−2,? −1,? 0,[ 15] +1,[ 7] [ 16] +2[ 17] Electronegativity Pauling scale: 1.61 Ionization energies 1st: 577.5 kJ/mol 2nd: 1816.7 kJ/mol 3rd: 2744.8 kJ/mol (more ) Atomic radius empirical: 143 pm Covalent radius 121±4 pm Van der Waals radius 184 pm Spectral lines of aluminiumNatural occurrence primordial Crystal structure face-centered cubic (fcc) Thermal expansion 23.1 µm/(m⋅K) (at 25 °C) Thermal conductivity 237 W/(m⋅K) Electrical resistivity 26.5 nΩ⋅m (at 20 °C) Magnetic ordering paramagnetic [ 18] Molar magnetic susceptibility +16.5× 10−6 cm3 /molYoung's modulus 70 GPa Shear modulus 26 GPa Bulk modulus 76 GPa Speed of sound thin rod (rolled) 5000 m/s (at r.t. ) Poisson ratio 0.35 Mohs hardness 2.75 Vickers hardness 160–350 MPa Brinell hardness 160–550 MPa CAS Number 7429-90-5 Naming from alumine , obsolete name for alumina Prediction Antoine Lavoisier (1782) Discovery Hans Christian Ørsted (1824) Named by Humphry Davy (1812[ b] )
Category: Aluminium | references
^ "aluminum" . Oxford English Dictionary (Online ed.). Oxford University Press . (Subscription or participating institution membership required.)
^ "Standard Atomic Weights: Aluminium" . CIAAW . 2017.
^ 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 .
^ Zhang, Yiming; Evans, Julian R. G.; Yang, Shoufeng (2011). "Corrected Values for Boiling Points and Enthalpies of Vaporization of Elements in Handbooks" . J. Chem. Eng. Data . 56 (2): 328–337. doi :10.1021/je1011086 .
^ 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 .
^ Unstable carbonyl of Al(0) has been detected in reaction of Al2 (CH3 )6 with carbon monoxide; see Sanchez, Ramiro; Arrington, Caleb; Arrington Jr., C. A. (December 1, 1989). "Reaction of trimethylaluminum with carbon monoxide in low-temperature matrixes" . American Chemical Society . 111 (25): 9110-9111. doi :10.1021/ja00207a023 . OSTI 6973516 .
^ a b Greenwood, Norman N. ; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann . p. 28. ISBN 978-0-08-037941-8 .
^ Dohmeier, C.; Loos, D.; Schnöckel, H. (1996). "Aluminum(I) and Gallium(I) Compounds: Syntheses, Structures, and Reactions". Angewandte Chemie International Edition . 35 (2): 129–149. doi :10.1002/anie.199601291 .
^ Tyte, D. C. (1964). "Red (B2Π–A2σ) Band System of Aluminium Monoxide". Nature . 202 (4930): 383. Bibcode :1964Natur.202..383T . doi :10.1038/202383a0 . S2CID 4163250 .
^
Lide, D. R. (2000). "Magnetic susceptibility of the elements and inorganic compounds" (PDF) . CRC Handbook of Chemistry and Physics (81st ed.). CRC Press . ISBN 0849304814 .
^ 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 .
^ a b Mougeot, X. (2019). "Towards high-precision calculation of electron capture decays" . Applied Radiation and Isotopes . 154 (108884). doi :10.1016/j.apradiso.2019.108884 .
^ "aluminum" . Oxford English Dictionary (Online ed.). Oxford University Press . (Subscription or participating institution membership required.)
^ "Standard Atomic Weights: Aluminium" . CIAAW . 2017.
^ Unstable carbonyl of Al(0) has been detected in reaction of Al2 (CH3 )6 with carbon monoxide; see Sanchez, Ramiro; Arrington, Caleb; Arrington Jr., C. A. (December 1, 1989). "Reaction of trimethylaluminum with carbon monoxide in low-temperature matrixes" . American Chemical Society . 111 (25): 9110-9111. doi :10.1021/ja00207a023 . OSTI 6973516 .
^ Dohmeier, C.; Loos, D.; Schnöckel, H. (1996). "Aluminum(I) and Gallium(I) Compounds: Syntheses, Structures, and Reactions". Angewandte Chemie International Edition . 35 (2): 129–149. doi :10.1002/anie.199601291 .
^ Tyte, D. C. (1964). "Red (B2Π–A2σ) Band System of Aluminium Monoxide". Nature . 202 (4930): 383. Bibcode :1964Natur.202..383T . doi :10.1038/202383a0 . S2CID 4163250 .
^
Lide, D. R. (2000). "Magnetic susceptibility of the elements and inorganic compounds" (PDF) . CRC Handbook of Chemistry and Physics (81st ed.). CRC Press . ISBN 0849304814 .
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