The decomposition of synthetic siderite (FeCO₃) in air atmosphere at room temperature conditions was studied. Siderite was formed by mechanochemical reaction of Fe₃O₄ and graphite at high CO₂ pressure in the presence of water. Kinetics of decomposition reaction was studied over period up to 9 days and it is shown that decomposition reaction obeys geometrical contraction solid-state reaction mechanism model. It was found that the water influences not only the kinetics of siderite formation but also its stability. Siderite completely decomposes at ambient conditions yielding magnetite (Fe₃O₄) and hematite (Fe₂O₃) which can reversibly re-absorb carbon dioxide.

研究了室温下空气中合成菱铁矿（FeCO ₃）的分解。在水的存在下，在高CO ₂压力下，Fe ₃ O ₄和石墨的机械化学反应形成菱铁矿。研究了长达9天的分解反应动力学，结果表明该分解反应服从几何收缩固态反应机理模型。发现水不仅影响菱铁矿形成的动力学，而且影响其稳定性。菱铁矿在环境条件下会完全分解，生成磁铁矿（Fe ₃ O ₄）和赤铁矿（Fe ₂ O ₃）可逆地吸收二氧化碳。