Mineralogy (carbonates): Which mineral contains both magnesium and calcium in its composition? Identify the double carbonate featuring Ca and Mg. Choose the correct option.

Q: Mineralogy (carbonates): Which mineral contains both magnesium and calcium in its composition? Identify the double carbonate featuring Ca and Mg. Choose the correct option.

Concept/Approach Dolomite is CaMg(CO3)2, a double carbonate of calcium and magnesium. Magnesite is MgCO3; Calcite is CaCO3; Carnallite is KMgCl3·6H2O. Final Answer Dolomite

Difficulty: Easy

Magnesite
Calcite
Carnallite
Dolomite

Correct Answer: Dolomite

Explanation:

Concept/Approach
Dolomite is CaMg(CO₃)₂, a double carbonate of calcium and magnesium. Magnesite is MgCO₃; Calcite is CaCO₃; Carnallite is KMgCl₃·6H₂O.

Final Answer
Dolomite

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