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Iron carbonate (FeCO), a widespread carbonate mineral that can be an ore of iron. The mineral commonly occurs in thin beds with shales, clay, or coal seams (as sedimentary deposits) and in hydrothermal metallic veins (as gangue, or waste rock).
Variants of SIDERITE
siderite or chalybite
This entry comes from Encyclopædia Britannica Concise. For the full entry on siderite, visit Britannica.com.