# 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: 2.744955 -0.013026744 2 0.016661518 -2 0.00048278001 -4 -2.5815825e-05 -6 1.5241247e-06 -8
  - type: tabulated k
    data: |
        0.310 6.0523E-06
        0.320 3.2967E-06
        0.330 1.8573E-06
        0.340 1.1038E-06
        0.350 6.4949E-07
        0.360 4.0225E-07
        0.370 2.3911E-07
        0.380 1.5511E-07
        0.390 1.1379E-07
        0.400 9.3675E-08
        0.420 6.4114E-08
        0.440 6.3599E-08
        0.460 5.5324E-08
        0.480 4.6114E-08
        0.500 3.1959E-08
        0.550 2.6340E-08
        0.600 2.3933E-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: -1.88e-06 1.19e-08 -1.1e-10 3.48e-07 6.14e-10 0.223
    nd: 1.67100
    Vd: 57.2
    glass_code: 671572
    density:
      - value: 3880
    thermal_expansion:
      - temperature_range: 293 573
        value: 8.5e-06
    dPgF: -0.0038
    resistance:
        climatic: 2.0
        acid: 5.0