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REFERENCES: "Y. Nigara. Measurement of the optical constants of yttrium oxide, <a href=\"https://doi.org/10.1143/JJAP.7.404\"><i>Jpn. J. Appl. Phys.</i> <b>7</b>, 404-408 (1968)</a>"
DATA:
  - type: formula 1
    range: 0.25 9.6
    coefficients: 0 2.578 0.1387 3.935 22.936
