The effect of alkali-chloride on the thermal hydrolysis of hydrated magnesium-chloride

DTA, TG and DTG curves were recorded for mixtures of hydrated MgCl₂ with NaCl, KC1 and CsCl. Infrared spectra of the mixtures were recorded after they had been heated to several temperatures. CsCl forms a stable solid solution with MgCl₂ and the thermal hydrolysis of the salt is prevented. The solid solution formed with KC1 is less stable than that formed with CsCl and hydrated Mg is thermally hydrolyzed to a small extent. No solid solution is formed with NaCl and MgCl₂ is thermally hydrolyzed in the presence of this salt.