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REFERENCES: "M. N. Afsar and J. B. Hasted. Measurements of the optical constants of liquid H<sub>2</sub>O and D<sub>2</sub>O between 6 and 450 cm<sup>−1</sup>, <a href=\"https://doi.org/10.1364/JOSA.67.000902\"><i>J. Opt. Soc. Am.</i> <b>67</b>, 902-904 (1977)</a>"
COMMENTS: "Heavy water (D<sub>2</sub>O) at 19.5 °C"
DATA:
  - type: tabulated nk
    data: |
        250.0 2.02 0.525
        285.7 2.05 0.553
        333.3 2.09 0.557
        400.0 2.14 0.586
        500.0 2.19 0.633
        666.7 2.28 0.722
        1000 2.43 0.915
        2000 3.02 1.146
SPECS:
    n_absolute: true
    wavelength_vacuum: true
    temperature: 19.5 °C
