CaMgCO
CaMgCO is not a standardized chemical formula. In mineralogical usage, it may appear as an informal shorthand for calcium–magnesium carbonate systems. The term most commonly alludes to the mineral dolomite, whose ideal chemical composition is CaMg(CO3)2. Writing CaMgCO as an abbreviation is potentially ambiguous because the complete carbonate framework comprises two carbonate groups per formula unit.
Dolomite is a rhombohedral carbonate mineral that is part of the calcite group but with ordered layers
Dolomite forms in marine settings through diagenetic alteration of limestone or direct precipitation from magnesium-rich fluids,
Key properties include a Mohs hardness of about 3.5–4, a specific gravity around 2.8–2.9, a vitreous luster,
The term CaMgCO should be interpreted with caution; the standard formula for the principal mineral is CaMg(CO3)2.