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REFERENCES: "1) G. D. Boyd, E. Buehler, F. G Storz, J. H. Wernick. Linear and nonlinear optical properties of ternary A<sup>II</sup>B<sup>IV</sup>C<sub>2</sub><sup>V</sup> chalcopyrite semiconductors, <a href=\"https://doi.org/10.1109/JQE.1972.1076982\"><i>IEEE J. Quant. Electron.</i>, <b>8</b>, 419-426 (1972)</a><br>2) G. C. Bhar and G. Ghosh. Temperature-dependent Sellmeier coefficients and coherence lengths for some chalcopyrite crystals, <a href=\"https://doi.org/10.1364/JOSA.69.000730\"><i>J. Opt. Soc. Am.</i> <b>69</b>, 730-733 (1979)</a><br>*Ref. 2 provides Sellmeier equation based on the data from Ref. 1"
COMMENTS: "Ordinary ray (o); 20 °C"
DATA:
  - type: formula 2
    range: 0.8 12.5
    coefficients: 4.9677 4.2286 0.2021 1.6351 671.33
