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Magnesium, Mg

Magnesium is a chemical element with the symbol Mg, the atomic number 12, and an atomic mass of 24.31. Magnesium is the ninth most abundant element in the universe by mass.[citation needed] It constitutes about 2% of the Earth's crust by mass, and it is the third most abundant element dissolved in seawater.[citation needed] Magnesium ions are essential to all living cells, and is the 11th most abundant element by mass in the human body. The free element (metal) is not found in nature. Once produced from magnesium salts, this alkaline earth metal is used as an alloying agent to make aluminium-magnesium alloys, sometimes called "magnalium" or "magnelium".

Technical Data
Symbol	Mg	Ionization energy/kJmol^-1II	1450
Atomic number	12	Density (20°C)/gcm^-3	1.738
No. of naturally occurring isotopes	3	Melting point /°C	649
Atomic weight	24.305	Boiling point /°C	1105
Electronic configuration	[Ne]3s2	ΔH_fus/kJmol^-1	8.9
Metal radius/pm	160	ΔH_vap/kJmol^-1	127.4
Ionic radius(6-coordinate)/pm	72	E^o(M²⁺_(aq)⁺2e^-→M_(S))/V	-2.37
Ionization energy/kJmol^-1 I	737.5	Electrical resistivity (20°C)/μohm cm	4.46

Evaporation Techniques
Temperature (^oC) @Vap. Pressure			Techniques				Remarks
10^-8 Torr	10^-6 Torr	10^-4 Torr	Electron Beam	Crucible	Coil	Boat	Remarks
185 Sublimes	247 Sublimes	327 Sublimes	Good	Al₂O₃ & Vitreous Graphite	Tungsten	Tungsten, Molybdenum, Niobium & Tantalum	Extremely high rates possible

Evaporation Materials
M1-5002-M Ingot (Please ask for sizes)
M1-5000-M pieces 1-5 mm

The foils are available in either rectangular or circular shape. Please enter width and length or diameter of the required foil.

Foil
M1-3000-F 0.004" (0.1mm)
M1-3003-F 0.008" (0.2mm)

Powder
M1-10000-P -100 mesh
M1-10003-P -325 mesh

Rods
M1-2000-R 0.0625" (1.58mm)
M1-2001-R 0.125" (3.175mm)
M1-2002-R 0.375" (9.25mm)

Sheet
M1-4001-S 0.020" (0.5mm)
M1-4002-S 0.030" (0.76mm)
M1-4003-S 0.040" (1mm)
M1-4004-S 0.125" (3.175mm)

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