# 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: |
    <a href="https://refractiveindex.info/download/data/2017/sumita_2017-02-02.agf">SUMITA Zemax catalog 2017-02-02</a> (obtained from <a href="http://www.sumita-opt.co.jp/en/download/">http://www.sumita-opt.co.jp</a>)<br>See also <a href="https://refractiveindex.info/download/data/2016/sumita_2016-02-01.pdf">SUMITA optical glass data book</a>
DATA:
  - type: formula 3
    wavelength_range: 0.36 1.55
    coefficients: 2.0377918 -0.0045854882 2 0.0057460341 -2 0.00014824175 -4 -1.2924899e-05 -6 6.7640906e-07 -8
  - type: tabulated k
    data: |
        0.270 8.3005E-06
        0.280 6.2688E-06
        0.290 4.2582E-06
        0.300 2.6540E-06
        0.310 1.5155E-06
        0.320 7.8749E-07
        0.330 3.9302E-07
        0.340 1.8764E-07
        0.350 8.4835E-08
        0.360 4.6207E-08
        0.370 1.7719E-08
        0.380 9.0855E-09
        0.390 6.2133E-09
        0.400 6.3726E-09
        0.420 6.6912E-09
        0.440 7.0098E-09
        0.460 7.3285E-09
        0.480 7.6471E-09
        0.500 7.9657E-09
        0.550 8.7623E-09
        0.600 9.5589E-09
        0.650 1.0355E-08
        0.700 1.1152E-08
        0.800 1.2745E-08
        1.060 1.6887E-08
        1.500 3.5864E-08
        2.000 1.4389E-07
CONDITIONS:
    temperature: 293
PROPERTIES:
    thermal_dispersion:
      - type: formula A
        coefficients: -2.06e-05 -5.62e-09 -2.69e-11 3.17e-07 3.49e-10 0.174
    nd: 1.43312
    Vd: 95.0
    glass_code: 434950
    density:
      - value: 3540
    thermal_expansion:
      - temperature_range: 243 343
        value: 1.29e-05
      - temperature_range: 293 573
        value: 1.67e-05
    dPgF: 0.0506
    resistance:
        climatic: 1.0
        acid: 4.0