Samples Containing Magnesium

Minerals

The various ores exist as Mg by itself (magnesite, MgCO₃ ; kieserite, MgSO₄-H₂O), combined with Ca (dolomite, CaSO₃-MgCO₃) and combined with K, Si, Fe, and B to form a variety or ores of commercial interest.

Since the magnesite and dolomite still contain trace amounts of Fe, Al, Si, Mn etc., it is considered best to prepare Mg containing ores by fusion with either lithium carbonate in graphite crucibles or sodium carbonate in Pt crucibles. The fuseate is dissolved in dilute HCl. Consult the following method for the preparation of limestone for Ca, Mg, Fe, Al, Mn, and Si using a lithium carbonate fusion: Sample Preparation Procedure.

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