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An introduction to minerals and rocks under the microscope

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Figure 56 (a) A ternary diagram with three end-member components A, B and C. (b) A ternary diagram with the composition A0.4B0.3C0.3 plotted. The percentages of the end-member components are indicated by thick lines, which intersect at a point that shows the overall composition. (c) A ternary diagram for use with Question 3.2.

 3.6.2 Feldspars