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Magnesium ( Mg )

Material Information

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Foil Microfoil Microleaf Powder Rod Single Crystal Sputtering Target Wire
Foil Microfoil Microleaf Powder Rod Single Crystal Sputtering Target Wire

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General Description:  

Magnesium was recognized in 1755 by Joseph Black in Edinburgh, Scotland, and isolated by Sir Humphrey Davy in 1808 in London.

Magnesium is a brilliant white metal, which is relatively soft. It is one of the more abundant elements, there being 23000 ppm in the earth's crust. As a powder, magnesium is extremely reactive, but as a solid it oxidises slowly in air and reacts slowly in water. It does not occur naturally, but is found in combination with other elements in minerals such as magnesite (MgCO3, primarily) and dolomite (the double carbonate of magnesium and calcium). As with other elements in groups 1 and 2 of the periodic table, it can be produced by electrolysis of the molten halide.

Applications of magnesium include its use as a deoxidiser for copper, brass and nickel alloys and it is also added to several aluminum base alloys. It is the basis of strong, light alloys used in the aircraft and automobile industries (e.g. in engine assemblies). Alloys with zirconium and thorium have also been investigated for their use in aircraft manufacture. Pure magnesium can also be used as a sacrificial electrode to protect other metals.

   

Atomic Properties

Atomic number 12
Atomic radius - Goldschmidt ( nm ) 0.160
Atomic weight ( amu ) 24.305
Crystal structure Hexagonal close packed
Electronic structure Ne 3s2
Ionization potential No. eV
1 7.65
2 15.03
3 80.1
4 109
5 141
6 187
Natural isotope distribution Mass No. %
24 78.99
25 10.00
26 11.01
Photo-electric work function ( eV ) 3.66
Thermal neutron absorption cross-section ( Barns ) 0.064
Valences shown 2

Electrical Properties

Electrical resistivity @20C ( µOhmcm ) 4.2
Temperature coefficient @0-100C ( K-1 ) 0.00425
Thermal emf against Pt (cold 0C - hot 100C) ( mV ) +0.44

Mechanical Properties

Material condition Soft Hard Polycrystalline
Bulk modulus ( GPa )     35.6
Hardness - Vickers 30-35 35-45
Poisson's ratio     0.291
Tensile modulus ( GPa )     44.7
Tensile strength ( MPa ) 185 232
Yield strength ( MPa ) 69 100

Physical Properties

Boiling point ( C ) 1090
Density @20C ( g cm-3 ) 1.74
Melting point ( C ) 649

Thermal Properties

Coefficient of thermal expansion @0-100C ( x10-6 K-1 ) 26.0
Latent heat of evaporation ( J g-1 ) 5254
Latent heat of fusion ( J g-1 ) 362
Specific heat @25C ( J K-1 kg-1 ) 1020
Thermal conductivity @0-100C ( W m-1 K-1 ) 156
All information and technical data are given as a guide only. Although every effort has been made to ensure that the information is correct, no warranty is given as to its completeness or accuracy.

Buy Magnesium on-line

We stock and supply the following standard forms:
Foil Microfoil Microleaf Powder Rod Single Crystal Sputtering Target Wire
Foil Microfoil Microleaf Powder Rod Single Crystal Sputtering Target Wire

Choose a form to search our on-line catalog  

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