# this file is part of refractiveindex.info database
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REFERENCES: |
    Cited as "R. L. Herbst (private communication)" in M. M. Choy and R. L. Byer.
    Accurate second-order susceptibility measurements of visible and infrared nonlinear crystals.
    <a href="https://doi.org/10.1103/PhysRevB.14.1693"><i>Phys. Rev. B</i> <b>14</b>, 1693-1706 (1976)</a>.
COMMENTS: |
    Room temperature. Ordinary ray (o).
CONDITIONS:
    direction: o
DATA:
  - type: formula 2
    wavelength_range: 0.5461 5
    coefficients: 1.03132 1.37623 0.0350832 1.06745 169.00