# 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: 2.800208 -0.012536465 2 0.019904622 -2 0.00012816526 -4 4.6545827e-05 -6 -2.8784776e-06 -8
  - type: tabulated k
    data: |
        0.280 7.4070E-06
        0.290 5.0522E-06
        0.300 3.3384E-06
        0.310 2.8032E-06
        0.320 1.4003E-06
        0.330 8.9570E-07
        0.340 5.5348E-07
        0.350 3.3084E-07
        0.360 2.0482E-07
        0.370 1.2941E-07
        0.380 7.9663E-08
        0.390 5.9534E-08
        0.400 4.4878E-08
        0.420 3.3591E-08
        0.440 2.8124E-08
        0.460 1.4672E-08
        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 3.8663E-07
CONDITIONS:
    temperature: 293
PROPERTIES:
    thermal_dispersion:
      - type: formula A
        coefficients: 1.72e-06 1.69e-08 -1.41e-10 6.62e-07 9.46e-10 0.149
    nd: 1.68983
    Vd: 52.9
    glass_code: 694531
    density:
      - value: 3810
    thermal_expansion:
      - temperature_range: 243 343
        value: 6.4e-06
      - temperature_range: 293 573
        value: 9.4e-06
    dPgF: -0.0062
    resistance:
        climatic: 1.0
        acid: 4.0