# this file is part of refractiveindex.info database
# refractiveindex.info database is in the public domain
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REFERENCES: "K. F. Hulme et al. Synthetic proustite (Ag<sub>3</sub>AsS<sub>3</sub>): a new crystal for optical mixing, <a href=\"https://doi.org/10.1063/1.1754880\"><i>Appl. Phys. Lett.</i> <b>10</b>, 133-135 (1967)</a>"
COMMENTS: "Ordinary ray (o), 20 °C"
DATA:
  - type: formula 4
    wavelength_range: 0.63 4.6
    coefficients: 7.483 0.474 0 0.09 1 0 0 0 1 -0.0019 2
