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#HOW TO PLOT ON A TERNARY DIAGRAM HOW TO#
The corresponding pie charts with all components are shown at the bottom.įinally, Fig.1.5 demonstrates how to plot the composition of a rock into a ternary diagram. The relative concentrations of the other components (red and yellow) change along these lines, as shown for 4 positions along the 20%-line. A content of 100% corresponds to the top corner, but a lower content, like 0%, 20% or 60%, is always represented by a line in the triangle. although ternary diagrams or charts are not standard in microsoft® excel, there are, however, templates and excel add ons available to download from the internet. here is an easy step by step guide on how to plot a ternary diagram in excel. To the left we see four pie charts showing different contents of the "blue component". Ternary diagrams are common in chemistry and geosciences to display the relationship of three variables. Because it would simply look confusing, the complete annotation of the axes is usually not shown.įigure 1.4 explains how the diagram is read. Note that now each edge of the triangle represents 2 axes with opposite directions for 2 components, going from 0% to 100% for one component and from 100% to 0% for the other. The corners represent the extreme cases in which only one component is present.įigure 1.3 shows the final ternary diagram, the combination of the three triangles from Fig.1.2. How the composition changes within the triangle and how the axes are drawn is shown independently for each component, symbolized by red, blue and yellow colors in various intensities corresponding to the relative concentration, in Fig.1.2. In a ternary diagram of the composition of a rock, the 3 edges of the triangle represent axes of the concentration of 3 components.