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Magnesium compounds

Magnesium in Metallurgy
What is magnesium?
Physical characteristics
  • magnesium atomic structure
  • magnesium notable features
  • mg isotopes and isolation
  • magnesium compounds
  • magnesium advantages
Magnesium history
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Use of magnesium nowadays
Magnesium alloys
  • number of magnesium alloys
  • alloying components
Metallurgy and engineering
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Magnesium applications
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Articles & Magnesium News

Magnesium compounds are really important and often used in many ways. Some binary compounds are magnesium with halogens, with oxygen, hydrogen and others. In compounds of magnesium (where known), the most common oxidation numbers of magnesium are:

Hydrides       MgH2 - magnesium (II) hydride
Fluorides       MgF2 - magnesium (II) fluoride
Chlorides      MgCl2 - magnesium (II) chloride
Bromides      MgBr2 6H2O - magnesium (II) bromide 6-water
                    MgBr2 - magnesium (II) bromide
Iodides         MgI2 - magnesium (II) iodide
Oxides          MgO - magnesium (II) oxide
                    MgO2 - magnesium (II) peroxide
Sulfides        MgS - magnesium (II) sulphide
Selenides      MgSe - magnesium (II) selenide
Tellurides      MgTe - magnesium (II) telluride
Nitrides         Mg3N2 - magnesium (II) nitride

Other magnesium compounds include magnesium carbonate (MgCO3) and magnesium fluoride (MgF2). Magnesium carbonate is used to make some types of paints and inks and is added to table salt to prevent caking. A thin film of magnesium fluoride is applied to optical lenses to help reduce glare and reflections.


What is magnesium?

Green vegetables such as spinach provide magnesium because the center of the chlorophyll molecule contains magnesium. Nuts (especially cashews and almonds), seeds, and some whole grains are also good sources of magnesium.

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Notable features

Magnesium is a fairly strong, silvery-white, light-weight metal. It is protected by a thin layer of oxide which is fairly impermeable and hard to remove. Magnesium reacts with water at room temperature, though it reacts much more slowly (for example) than calcium.

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