American Mineralogist -- Dyar et al. 92 (23): 424 Figure 2

Click on image to view larger version.

FIGURE 2. Fits to three of the synthetic pyroxenes: Fs₁₀₀, Fs₅₀En₅₀, and Fs₁₀En₉₀. The outer M1 doublet is shown as a dashed line, while the inner M2 doublet is shown as a solid gray line.