# 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: |
    D. R. Smith and E. V. Loewenstein.
    Optical constants of far infrared materials. 3: plastics.
    <a href="https://doi.org/10.1364/AO.14.001335"><i>Appl. Opt.</i> <b>14</b>, 1335-1341 (1975)</a>
COMMENTS: |
    Manufactured by Imperial Chemical Industries under the name TPX.
DATA:
  - type: tabulated nk
    data: |
        29.4118 1.450 0.0021
        30.3030 1.448 0.0021
        31.2500 1.448 0.0021
        32.2581 1.449 0.0022
        33.3333 1.449 0.0024
        34.4828 1.449 0.0024
        35.7143 1.449 0.0025
        37.0370 1.449 0.0024
        38.4615 1.449 0.0025
        40.0000 1.449 0.0026
        41.6667 1.450 0.0028
        43.4783 1.451 0.0028
        45.4545 1.451 0.0028
        47.6190 1.451 0.0028
        50.0000 1.450 0.0028
        52.6316 1.449 0.0029
        55.5556 1.448 0.0030
        58.8235 1.448 0.0032
        62.5000 1.447 0.0033
        66.6667 1.447 0.0036
        71.4286 1.447 0.0038
        76.9231 1.447 0.0041
        83.3333 1.446 0.0043
        90.9091 1.446 0.0045
        100.0000 1.446 0.0049
        111.1111 1.446 0.0055
        125.0000 1.446 0.0064
        142.8571 1.446 0.0073
        166.6667 1.446 0.0084
        200.0000 1.447 0.0095