# 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: 2.8262394 -0.012783119 2 0.017254526 -2 0.00043487714 -4 -1.9342271e-05 -6 1.18082e-06 -8
  - type: tabulated k
    data: |
        0.270 5.3737E-06
        0.280 4.6875E-06
        0.290 3.6912E-06
        0.300 2.9884E-06
        0.310 3.0708E-06
        0.320 1.4314E-06
        0.330 9.2916E-07
        0.340 5.8017E-07
        0.350 3.7510E-07
        0.360 2.0482E-07
        0.370 1.1101E-07
        0.380 8.5878E-08
        0.390 5.3213E-08
        0.400 2.2360E-08
        0.420 1.3396E-08
        0.440 1.4034E-08
        0.460 1.4672E-08
        0.480 1.5310E-08
        0.500 1.5947E-08
        0.550 1.7542E-08
        0.600 1.9137E-08
        0.650 2.0732E-08
        0.700 2.2326E-08
        0.800 2.5516E-08
        1.060 3.3809E-08
        1.500 4.7842E-08
        2.000 3.3778E-07
CONDITIONS:
    temperature: 293
PROPERTIES:
    thermal_dispersion:
      - type: formula A
        coefficients: -4.73e-06 9.33e-09 -1.14e-10 4.36e-07 4.83e-10 0.169
    nd: 1.69560
    Vd: 59.0
    glass_code: 696590
    density:
      - value: 4560
    thermal_expansion:
      - temperature_range: 243 343
        value: 6.9e-06
      - temperature_range: 293 573
        value: 9.3e-06
    dPgF: -0.0019
    resistance:
        climatic: 1.0
        acid: 4.0