Mineral Species containing Magnesium (Mg)

Element Properties, Isotopic Compositions for Magnesium

**Magnesium (Mg) Element Properties**
Atomic Mass	24.305
Atomic Number	12
Name Origins	Greek, "Magnesia" a district in Thessaly.
Year Discovered	1755
Discovery Credits	Recognized by Joseph Black at Edinburgh, Scotland. Isolated by Sir Humphry Davy in 1808.
Remarks	Silvery white, lustrous, relatively soft metal. Obtained by electrolysis of fused MgCl₂. Burns in air and reacts with hot water. Used as bulk metal and in lightweight alloys with magnesium for engines, also as a sacrificial electrode to protect other metals. Diagnostic tests: Moistened, after heating, with cobalt nitrate (CoNO₃)and again ignited, a pink color is obtained from some infusible compounds of magnesium. Infusible magnesium minerals glow with exaggerated incandescence in the flame test (along with Sr, Ca, Zr, Zn, Ce - the "lime light effect"). In solution, (NH₄)₂SO₄ and (NH₄)₂C₂O₄ will remove Ca and Ba as a precipitate. Decant the solution and add NH₄OH and Na₂HPO₄. A white precipitate (MgNH₄PO₄) shows the presence of magnesium.
References	Emsley, J., 1991; THE ELEMENTS : Sec. Ed., Clarendon Press, Oxford, 251 p.
See Also	WebElements, ChemiCool

**Naturally Occurring Isotopes**
Symbol	Isotope Mass	Isotope Nuclide Number	Isotope Number	Natural Abundance	Half-life Units
Mg	23.985042	24	12	78.9900%	Stable
Mg	24.985837	25	12	10.0000%	Stable
Mg	25.982593	26	12	11.0100%	Stable

Magnesium (Mg) Minerals sorted by Descending Weight Percent

Click here for List sorted by Mineral Name

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**903 Minerals containing Magnesium (Mg) sorted by Descending Weight Percent**
% Mg	Mineral Name	Chemical Formula	MW
0.01 % Mg	Lakargiite !	CaZrO3	177.87
0.01 % Mg	Heulandite-Ca #	(Ca,Na)2-3Al3(Al,Si)2Si13O36·12(H2O)	2,825.14

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