Abstract
A study was made on the topochemical processes of hydration-dehydration, ammonation-deammonation, disproportionation and anionic condensation (certain of which can proceed concurrently) that occur during the production, storage and exploitation of phosphoric salts and phosphate materials. These processes which can be accompanied by complicated structural transformations and sometimes by melting were shown to be satisfactorily described by the known kinetic regularities. The detected deviations, that are associated with the anomalous influence of temperature, the gaseous phase, the size and habit of the crystals and the ageing of samples on the process rate, were explained in terms of the localization peculiarities of the reactions proceeding on the surface or in the bulk of the reactant.
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Samuskevich, V.V. Kinetics and Mechanism of Topochemical Transformations of Phosphoric Salts. Journal of Thermal Analysis and Calorimetry 63, 797–805 (2001). https://doi.org/10.1023/A:1010152407115
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DOI: https://doi.org/10.1023/A:1010152407115