Solubility of Components in the Magnesium Chlorate–Thiourea–Water System

The eutonic points of the magnesium chlorate–water and thiourea–water binary systems were determined. Based on these data and on six internal polythermal sections of the Mg(ClO3)2–CS(NH2)2–H2O system, a polythermal phase diagram was constructed for the temperature range from –52.8 to 10.0°C. The diagram reveals the crystallization fields of ice, thiourea, and the magnesium chlorate crystal hydrates Mg(ClO3)2·6H2O, Mg(ClO3)2·12H22O, and Mg(ClO3)2·16H2O. Furthermore, for the internal section [45%[36%Mg(ClO3)2 + 9%MgCl2] + 55%H2O]–CS(NH2)2, the solution crystallization temperature, viscosity, density, pH, and refractive index were studied as functions of composition. A “composition–property” diagram was plotted based on the results.