# 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: 2.0169979 -0.0038361684 2 0.0058184635 -2 4.503131e-05 -4 6.6434463e-07 -6 5.0922311e-09 -8
  - type: tabulated k
    data: |
        0.270 4.3015E-09
        0.280 4.4608E-09
        0.290 4.6201E-09
        0.300 4.7794E-09
        0.310 4.9387E-09
        0.320 5.0981E-09
        0.330 5.2574E-09
        0.340 5.4167E-09
        0.350 5.5760E-09
        0.360 5.7353E-09
        0.370 5.8946E-09
        0.380 6.0539E-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 2.3897E-08
        2.000 3.1863E-08
CONDITIONS:
    temperature: 293
PROPERTIES:
    thermal_dispersion:
      - type: formula A
        coefficients: -1.99e-05 -5.55e-09 -1.56e-11 2.73e-07 7.18e-11 0.183
    nd: 1.42580
    Vd: 97.4
    glass_code: 426974
    density:
      - value: 3750
    thermal_expansion:
      - temperature_range: 243 343
        value: 1.3e-05
      - temperature_range: 293 573
        value: 1.61e-05
    dPgF: 0.0526
    resistance:
        climatic: 1.0
        acid: 4.0