# this file is part of refractiveindex.info database
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REFERENCES: "G. Tamošauskas, G. Beresnevičius, D. Gadonas, A. Dubietis. Transmittance and phase matching of BBO crystal in the 3−5 μm range and its application for the characterization of mid-infrared laser pulses , <a href=\"https://doi.org/10.1364/OME.8.001410\"><i>Opt. Mater. Express</i>, <b>8</b>, 1410-1418 (2018)</a>"
COMMENTS: "Beta barium borate (ß-BaB<sub>2</sub>O<sub>4</sub>, BBO). Ordinary ray (o)."
DATA:
  - type: formula 2
    wavelength_range: 0.188 5.2
    coefficients: 0 0.90291 0.003926 0.83155 0.018786 0.76536 60.01
