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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 critical analysis of experimental data from several sources.
COMMENTS: |
    297 K (24 °C).
DATA:
  - type: formula 1
    wavelength_range: 0.18 40
    coefficients: 0.47558 0.5600 0.138 0.14493 0.166 2.74000 85.84