Synthesis of Calcium and Strontium Fluorides Using Li 2 SO 4 –Na 2 SO 4 Eutectic Melts

Calcium fluoride and strontium fluoride powders were prepared from respective alkaline-earth metal sulfates by a chemical reaction carried out in molten salt flux made up of lithium and sodium sulfates at 700°С. The fluorinating agent used was sodium fluoride. The irregular shapes of powder particles are likely to arise from the topotaxic phenomena occurring on the precursor calcium sulfate and strontium sulfate particles.