# 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: 2.8960747 -0.011713123 2 0.021599254 -2 0.00043811038 -4 5.752903e-06 -6 -1.7364157e-07 -8
  - type: tabulated k
    data: |
        0.310 1.3070E-05
        0.320 6.4637E-06
        0.330 2.6395E-06
        0.340 1.8862E-06
        0.350 1.0619E-06
        0.360 6.2854E-07
        0.370 3.5971E-07
        0.380 2.1945E-07
        0.390 1.4940E-07
        0.400 1.1671E-07
        0.420 7.4350E-08
        0.440 6.7167E-08
        0.460 6.2765E-08
        0.480 5.7730E-08
        0.500 4.8035E-08
        0.550 3.9569E-08
        0.600 3.8351E-08
        0.650 2.5928E-08
        0.700 1.6736E-08
        0.800 1.2745E-08
        1.060 1.6887E-08
        1.500 9.5877E-08
        2.000 5.8353E-07
CONDITIONS:
    temperature: 293
PROPERTIES:
    thermal_dispersion:
      - type: formula A
        coefficients: -2.63e-06 2.02e-08 -6.98e-11 5.94e-07 9.57e-10 0.184
    nd: 1.72000
    Vd: 50.3
    glass_code: 720503
    density:
      - value: 4080
    thermal_expansion:
      - temperature_range: 243 343
        value: 7.2e-06
      - temperature_range: 293 573
        value: 8.6e-06
    dPgF: -0.0066
    resistance:
        climatic: 1.0
        acid: 4.0