What method will separate ammonium chloride from sodium chloride?

Ammonium chloride can be separated from sodium chloride using a method called sublimation. When the mixture is heated, ammonium chloride sublimates, turning directly from solid to gas, while sodium chloride remains solid. The gaseous ammonium chloride can then be cooled and collected as a solid again, effectively separating it from sodium chloride. This method takes advantage of the differing physical properties of the two salts.