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REFERENCES: |
    H. H. Li.
    Refractive index of alkali halides and its wavelength and temperature derivatives.
    <a href="https://doi.org/10.1063/1.555536"><i>J. Phys. Chem. Ref. Data</i> <b>5</b>, 329-528 (1976)</a> and references therein.<br>
    * Sellmeier formula is derived by fitting experimental data from several sources.
COMMENTS: |
    297 K (24 °C).
DATA:
  - type: formula 1
    wavelength_range: 0.25 67
    coefficients: 0.27587 0.68689 0.130 0.26090 0.147 0.06256 0.163 0.06527 0.177 0.14991 0.185 0.51818 0.206 0.01918 0.218 3.38229 161.29