The Solid Solution between NaClO3 and NaBrO3 Revisited

NaClO3 and NaBrO3 are believed to form a complete solid solution from RT to fusion. The unique solid phase can thus be written: NaClO3( (1-x))-NaBrO3( x) with: 0 <= x <= 1. This study shows that at high temperatures, this statement might be valid. Nevertheless, up to 50 degrees C, probably up to 160 degrees C, and even higher temperatures, this is not true when the system is in thermodynamic equilibrium. A large miscibility gap exists at room temperature (RT). This gap could be reduced up to a complete disappearance by fast crystallization, for instance, spray-drying. The necessary conditions to access equilibrium, including homochirality, are also discussed.