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REFERENCES: |
    S.H. Wemple, M. Didomenico Jr., I. Camlibel.
    Dielectric and optical properties of melt-grown BaTiO<sub>3</sub>.
    <a href="https://doi.org/10.1016/0022-3697(68)90164-9"><i>J. Phys. Chem. Solids</i> <b>29</b>, 1797-1803 (1968)</a>
COMMENTS: |
    Extraordinary ray (e). Room temperature
CONDITIONS:
    direction: e
DATA:
  - type: formula 1
    wavelength_range: 0.4 0.7
    coefficients: 0 4.064 0.211