Untersuchung des einflusses der analysenbedingungen auf die zersetzung von 4MgCO3 ·Mg(OH)2 · 4H2O und die bildung von magnesit MgCO3

The processes, which influence the decomposition of 4MgCO₃ ·-Mg(OH)₂ · 4H₂O, could be determined by systematical variation of the analytical parameters. The original crystal structure exists in a wide temperature range during the decomposition. The formation of magnesite is a secondary reaction of the gaseous phase with the reaction product.H₂O and CO₂, are released simultaneously in different proportions during the decomposition to 500°C. Stoichiometric intermediates were not found. The original crystal structure collapsed, when the last H₂O escapes. The ratio of MgCO₃: MgO can be influenced by partial pressure of CO₂ in a wide range.