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REFERENCES: |
    1) W. L. Bond.
    Measurement of the refractive indices of several crystals.
    <a href="https://doi.org/10.1063/1.1703106"><i>J. Appl. Phys.</i> <b>36</b>, 1674-1677 (1965)</a><br>
    2) Handbook of Optics, 3rd edition, Vol. 4. McGraw-Hill 2009</br>
    * Ref. 2 provides a dispersion formula based on data from ref. 1
COMMENTS: |
    Extraordinary ray (e). Room temperature.
CONDITIONS:
    direction: e
DATA:
  - type: formula 1
    wavelength_range: 0.45 4.0
    coefficients: 0 2.6041 0.1379 4.1237 21.371