| (Min.) | a liquid of high density, as a solution of mercuric iodide in potassium iodide (called the Sonstadt solution or Thoulet solution) having a maximum specific gravity of 3.2, or of borotungstate of cadium (Klein solution, specific gravity 3.6), and the like. Such solutions are much used in determining the specific gravities of minerals, and in separating them when mechanically mixed as in a pulverized rock. |