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REFERENCES: "A. Harasaki and K. Kato. New data on the nonlinear optical constant, phase-matching, and optical damage of AgGaS<sub>2</sub>, <a href=\"https://doi.org/10.1143/JJAP.36.700\"><i>Jap. J. Appl. Phys.</i>, <b>36</b>, 700-703 (1997)</a>"
COMMENTS: "Extraordinary ray (e)"
DATA:
  - type: formula 4
    range: 0.81 16
    coefficients: 6.6792 0.4598 0 0.2122 1 0 0 0 1 -0.00126 2
