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REFERENCES: |
    P. T. B. Shaffer.
    Refractive index, dispersion, and birefringence of silicon carbide polytypes.
    <a href="https://doi.org/10.1364/AO.10.001034"><i>Appl. Opt.</i> <b>10</b>, 1034-1036 (1971)</a>
COMMENTS: |
    β-SiC (zincblende crystal structure)
DATA:
  - type: formula 5
    wavelength_range: 0.467 0.691
    coefficients: 2.5538 0.0342 -2