# this file is part of refractiveindex.info database
# refractiveindex.info database is in the public domain
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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. Extraordinary ray (e)."
DATA:
  - type: formula 2
    wavelength_range: 0.5461 5
    coefficients: 0.83086 1.08807 0.0313810 0.554582 158.76
