# 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: 2.6532657 -0.011570116 2 0.015955637 -2 0.00023811283 -4 1.7165459e-05 -6 -1.4129709e-06 -8
  - type: tabulated k
    data: |
        0.300 5.8571E-06
        0.310 3.0622E-06
        0.320 1.7147E-06
        0.330 9.5925E-07
        0.340 5.6346E-07
        0.350 3.3398E-07
        0.360 2.0175E-07
        0.370 1.2941E-07
        0.380 8.8991E-08
        0.390 6.2700E-08
        0.400 5.7818E-08
        0.420 4.3734E-08
        0.440 4.5817E-08
        0.460 3.6790E-08
        0.480 2.2987E-08
        0.500 2.3945E-08
        0.550 2.6340E-08
        0.600 1.4345E-08
        0.650 1.5541E-08
        0.700 1.1152E-08
        0.800 1.2745E-08
        1.060 1.6887E-08
        1.500 3.5864E-08
        2.000 4.8477E-07
CONDITIONS:
    temperature: 293
PROPERTIES:
    thermal_dispersion:
      - type: formula A
        coefficients: -2.11e-06 1.88e-08 -1.93e-10 4.01e-07 3.43e-10 0.195
    nd: 1.64250
    Vd: 58.1
    glass_code: 643581
    density:
      - value: 3760
    thermal_expansion:
      - temperature_range: 243 343
        value: 6.2e-06
      - temperature_range: 293 573
        value: 7.9e-06
    dPgF: -0.0014
    resistance:
        acid: 4.0