ABSTRACT

Protodolomite was synthesized from sea water containing dioxane by adding 0.4M Na₂CO₃ solution at 40°C. The presence of dioxane in moderate concentrations (3 to 8vol%) in a parent solution favors the formation of CaCO₃(calcite)-MgCO₃ solid solution. Optimal condition for protodolomite synthesis was established. The mineral synthesized from sea water containing dioxane was very superior in size and crystallinity as compared to that from highly saline but dioxane-free solutions.