In chemistry, a binary compound is something consisting of precisely two elements. ... A few examples of chemical elements are hydrogen, oxygen, and iron. This means that a binary compound will be composed of two different chemical elements. In a binary compound, there may be only one of each element.
a binary phase or binary compound is a chemical compound containing two different elements. Some binary phase compounds are molecular, e.g. carbon tetrachloride. More typically binary phase refers to extended solids.
