Aluminium

A silvery white reactive metal which is usually covered in oxide, making it inert to acids, but it is attacked by alkalies. It is extracted from the hydrated oxide, Bauxite, by electrolysis of the oxide dissolved in molten sodium hexafluoroaluminate (cryolite). The metal has good thermal properties and is malleable and ductile. During the 19th century aluminium was the most expensive metal and some jewellery was made from it.


Symbol
Al

Uses
Aluminium and its alloys are widely used for various applications including aircraft assemblies and engine parts.

Discovered
The element was known in prehistoric times. In 1825 Hans Christian Oersted isolated impure aluminium. The pure metal was first isolated by Friedrich Wohler in 1827.

Abundance
The most common metallic element in the earth's crust at 82000 ppm.

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Atomic number 13 Clip
Atomic / Molecular Weight 26.98154 gmol-1Clip
Density 2698 kgm-3Clip
Crystal Structure fcc Clip
Lattice constant 405 fmClip
Melting Point 934 KClip
Boiling Point 2793 KClip
Tensile strength 8000000 Nm-2Clip
Yield strength 50000000 Nm-2Clip
Youngs modulus 70000000000 Nm-2Clip
Poissons ratio 0.33 Clip
Linear expansivity 0.000023 K-1Clip
Specific heat capacity 900 Jkg-1K-1Clip
Latent heat of evaporation 10500000 Jkg-1Clip
Latent heat of fusion 377000 Jkg-1Clip
Thermal conductivity 236 Wm-1K-1Clip
Ionic radii 0.05 nmClip
Acoustic wave velocity (longitudinal bulk waves) 6374 ms-1Clip
Acoustic wave velocity (Irrotational waves) 5102 ms-1Clip
Acoustic wave velocity (Shear waves) 3111 ms-1Clip
Acoustic wave velocity (Rayleigh waves) 2906 ms-1Clip
Bulk Modulus of Rigidity 75500000000 Nm-2Clip
Electromotive Series 1.67 VClip
Brinell Hardness 15 HBClip
Electrical Conductivity 35000000 Sm-1Clip
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See also: Alclad, Aluminium 1000 series, Aluminium 2000 series, Aluminium 3000 series, Aluminium 4000 series, Aluminium 5000 series, Aluminium 6000 series, Aluminium 7000 series, Aluminium 8000 series, Aluminium Alloys, Aluminium Bromide, Aluminium Bronze, Aluminium Chloride, Aluminium Fluoride, Aluminium Hydride, Aluminium Hydroxide, Aluminium Iodide, Aluminium Nitride, Aluminium Oxide, Aluminium Production, Aluminium Sulphide, Bauxite, Bright Dip, Four High Mill, Gibbsite, Light Metal, Magnesium Silicide, Nonferrous, Periodic Table, Thermite Process.

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Subjects: Chemistry Mechanical Engineering


Weblinks:
The Aluminium Association News from the industry.