Fundamental Researches on Metallurgical Treatment of Manganese Ores. (II) : On the Thermal Dissociation of Manganous Carbonate

The dissociation equilibrium of manganous carbonate was measured by static method, having regard to avoid the influence of H_2O and CO_2 accompanying it. Below 337℃, the relation should be expressed as [numerical formula] while above this temperature it should be [numerical formula] From these results and those of 1st report, the present writers explained that the dissociation phenomenon consists of two steps, and the following relation was obtained above 337℃, [numerical formula] By using the values here obtained, the free energy change at the decomposition temperature was calculated as follows : [numerical formula