# 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: 2.9713549 -0.015047149 2 0.020748381 -2 0.00068239287 -4 -4.5897244e-05 -6 3.0151479e-06 -8
  - type: tabulated k
    data: |
        0.280 7.2286E-06
        0.290 5.4080E-06
        0.300 3.8542E-06
        0.310 3.6471E-06
        0.320 1.9011E-06
        0.330 1.2809E-06
        0.340 8.4409E-07
        0.350 5.4256E-07
        0.360 3.4029E-07
        0.370 2.1051E-07
        0.380 1.3607E-07
        0.390 9.1333E-08
        0.400 6.4307E-08
        0.420 4.0350E-08
        0.440 2.8124E-08
        0.460 2.2030E-08
        0.480 1.5310E-08
        0.500 1.1955E-08
        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 5.1762E-07
CONDITIONS:
    temperature: 293
PROPERTIES:
    thermal_dispersion:
      - type: formula A
        coefficients: 1.61e-06 1.71e-08 -9.82e-11 5.38e-07 2.35e-11 0.138
    nd: 1.74100
    Vd: 52.7
    glass_code: 741527
    density:
      - value: 4310
    thermal_expansion:
      - temperature_range: 243 343
        value: 5.8e-06
      - temperature_range: 293 573
        value: 7.4e-06
    dPgF: -0.0095
    resistance:
        acid: 4.0