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Light Magnesium Carbonate C2FD

Alternate Names: MgCO3

Oxide Analysis Formula
MgO 42.50% 1.00
Oxide Weight 40.30
Formula Weight 92.96


A white powder, odourless, practically insoluble in water. It dissolves in dilute acids with a strong effervescence. It is made by decarbonizing Magnesite.

Chlorides (Cl): 0.07%
Sulphate (SO4): 0.3%
Arsenic (As): 2ppm
Calcium (Ca): 0.75%
Iron (Fe): 400ppm
Heavy Metals: 20ppm

Apparent volume: 120-170 ml/15g

Related Information


The Mineral Hydromagnesite
Materials Light Magnesium Carbonate
Typecodes Flux Source
Materials that source Na2O, K2O, Li2O, CaO, MgO and other fluxes but are not feldspars or frits. Remember that materials can be flux sources but also perform many other roles. For example, talc is a flux in high temperature glazes, but a matting agent in low temperatures ones. It can also be a flux, a filler and an expansion increaser in bodies.

By Tony Hansen

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