# 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: 2.7376882 -0.012269245 2 0.017439403 -2 0.00047088707 -4 -2.7150134e-05 -6 1.8172045e-06 -8
  - type: tabulated k
    data: |
        0.270 7.3955E-06
        0.280 4.8980E-06
        0.290 3.3717E-06
        0.300 3.0475E-06
        0.310 1.4659E-06
        0.320 8.7214E-07
        0.330 5.0200E-07
        0.340 2.9109E-07
        0.350 1.6346E-07
        0.360 9.6133E-08
        0.370 5.3481E-08
        0.380 4.5703E-08
        0.390 3.7468E-08
        0.400 3.1991E-08
        0.420 3.3591E-08
        0.440 3.1655E-08
        0.460 2.2030E-08
        0.480 1.9146E-08
        0.500 1.9944E-08
        0.550 2.1939E-08
        0.600 1.4345E-08
        0.650 1.0355E-08
        0.700 1.1152E-08
        0.800 1.2745E-08
        1.060 1.6887E-08
        1.500 5.9833E-08
        2.000 5.1762E-07
CONDITIONS:
    temperature: 293
PROPERTIES:
    thermal_dispersion:
      - type: formula A
        coefficients: -1e-06 1.6e-08 -1.38e-10 5.07e-07 3.13e-10 0.19
    nd: 1.66955
    Vd: 55.4
    glass_code: 670554
    density:
      - value: 3440
    thermal_expansion:
      - temperature_range: 243 343
        value: 8e-06
      - temperature_range: 293 573
        value: 1e-05
    dPgF: -0.007
    resistance:
        climatic: 1.0
        acid: 4.0