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REFERENCES: |
    1) J. Walling, O. Peterson, H. Jenssen, R. Morris, E. O'Dell.
    Tunable alexandrite lasers.
    <a href="https://doi.org/10.1109/JQE.1980.1070430"><i>IEEE J. Quantum Electron.</i>, <b>16</b>, 1302–1315 (1980)</a><br>
    2) P. Loiko, A. Major.
    Dispersive properties of alexandrite and beryllium hexaaluminate crystals.
    <a href="https://doi.org/10.1364/OME.6.002177"><i>Opt. Mater. Express</i>, <b>6</b>, 2177–2183 (2016)</a><br>
    * Ref. 2 provides a dispersion formula based on  the experimental data from Ref. 1
COMMENTS: |
    n<sub>γ</sub>; Room temperature.
CONDITIONS:
    direction: gamma
DATA:
  - type: formula 4
    wavelength_range: 0.25 2.6
    coefficients: 1.70690 1.28477 2 0.01169 1 0 0 0 0 -0.01760 2