Mixed Perhalides of Calcium

Iodine dissolves more readily in solutions of calcium chloride, bromide, and iodide than in pure water, probably due to the formation of perhalogen compounds in solution.

It will be noticed that the tendency to polyhalide formation is by far the greatest in the case of the iodide. Bromine is also taken up in considerable quantity.

Determinations of the freezing-point lowering in aqueous solutions seem to indicate the possibility of the formation of the compound CaBr₄I₂.