# this file is part of refractiveindex.info database
# refractiveindex.info database is in the public domain
# copyright and related rights waived via CC0 1.0

REFERENCES: "H. E. Ives and H. B. Briggs. The optical constants of potassium, <a href=\"https://doi.org/10.1364/JOSA.26.000238\"><i>J. Opt. Soc. Am.</i> <b>26</b>, 238-246 (1936)</a>"
DATA:
  - type: tabulated nk
    data: |
        0.2536 0.744 0.049
        0.3126 0.410 0.080
        0.3650 0.150 0.443
        0.4047 0.105 0.710
        0.4358 0.121 0.978
        0.5461 0.091 1.42
        0.5780 0.094 1.57
