Accurate Cell Dimensions 6. We now come to the main purpose of this article - the application of the foregoing methods to the study of phase diagrams. There cannot be more than two phases in equilibrium in general.
Solid solutions are very common.
If the two elements have the same structure, such as copper and nickel, the solid solution may extend from one to the other. But most systems have a succession of solid solutions and intermetallic compounds, as exemplified in Fig. 6. A binary phase diagram showing two primary solid solutions and and one secondary solid solution, . Figure 6 is called a phase diagram . Between E and F only is present, and from F to G there is another two-phase region .