Definition of "chalybite" []

• Native iron carbonate. (noun)

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• "Magnetite is one of several types of iron oxide and its official (IUPAC) name is Siderite, aka chalybite, is a carbonate of iron, FeCO3"
• "All carbonates are soluble with effervescence in dilute acids; some, such as chalybite and magnesite, require the aid of heat."
• "It is rhombohedral in crystallization and isomorphous with calcite and chalybite."