# 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: 2.9333796 -0.014920134 2 0.020207432 -2 0.00041238589 -4 -1.230332e-05 -6 1.1436994e-06 -8
  - type: tabulated k
    data: |
        0.290 8.8080E-06
        0.300 6.7975E-06
        0.310 5.6803E-06
        0.320 3.5712E-06
        0.330 2.4194E-06
        0.340 1.5979E-06
        0.350 1.0174E-06
        0.360 6.4284E-07
        0.370 3.9990E-07
        0.380 2.4557E-07
        0.390 1.6901E-07
        0.400 1.1340E-07
        0.420 7.4350E-08
        0.440 6.3599E-08
        0.460 5.5324E-08
        0.480 4.6114E-08
        0.500 3.9989E-08
        0.550 3.9569E-08
        0.600 2.3933E-08
        0.650 1.5541E-08
        0.700 1.1152E-08
        0.800 1.2745E-08
        1.060 1.6887E-08
        1.500 5.9833E-08
        2.000 7.4949E-07
CONDITIONS:
    temperature: 293
PROPERTIES:
    thermal_dispersion:
      - type: formula A
        coefficients: 6.73e-07 2.1e-08 -1.63e-10 4.91e-07 2.14e-10 0.164
    nd: 1.72916
    Vd: 54.7
    glass_code: 729547
    density:
      - value: 4080
    thermal_expansion:
      - temperature_range: 243 343
        value: 5.6e-06
      - temperature_range: 293 573
        value: 7.1e-06
    dPgF: -0.0092
    resistance:
        climatic: 1.0
        acid: 4.0