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Siderite (FeCO 3 ): Thermal Decomposition in Equilibrium with Graphite

Bevan M. French, Philip E. Rosenberg

Abstract

The thermal stability of siderite (FeCO(3)) was studied by two independent methods in which the oxygen fugacity of the gas phase was controlled by equilibration with graphite. Both series of experiments indicate that siderite decomposes stably to magnetite + graphite between 455 degrees and 465 degrees C at 500 to 2000 bars PCO2 + P(CO).

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Key concepts: Siderite, Graphite, Magnetite, Fugacity, Thermal decomposition, Materials science, Decomposition, Oxygen