# this file is part of refractiveindex.info database
# refractiveindex.info database is in the public domain
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REFERENCES: "D. E. Zelmon et al.. 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."
DATA:
  - type: formula 2
    wavelength_range: 2 9
    coefficients: 7.0929 1.8649 0.41468 0 0.84052 1 452.05
