# this file is part of refractiveindex.info database
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REFERENCES: |
    D. E. Zelmon, E. A. Hanning, P. G. Schunemann.
    Refractive-index measurements and Sellmeier coefficients for zinc germanium phosphide from 2 to 9 µm with implications for phase matching in optical frequency-conversion devices.
    <a href="https://doi.org/10.1364/JOSAB.18.001307"><i>J. Opt. Soc. Am. B</i> <b>18</b>, 1307-1310 (2001)</a>
COMMENTS: |
    Extraordinary ray (e); 21-22 °C.
CONDITIONS:
    temperature: 294
    direction: e
DATA:
  - type: formula 2
    wavelength_range: 2 9
    coefficients: 7.0929 1.8649 0.41468 0.84052 452.05