# 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/ohara_2017-11-30.agf">OHARA Zemax catalog 2017-11-30</a> (obtained from <a href="http://www.ohara-inc.co.jp/en/product/optical/list/">http://www.ohara-inc.co.jp</a>)<br>See also <a href="https://refractiveindex.info/download/data/2017/ohara_2017-11-30.pdf">OHARA glass data sheets</a>
COMMENTS: |
    Low Softening Temperature 
DATA:
  - type: formula 2
    wavelength_range: 0.3 2.4
    coefficients: 0 1.28516283 0.00641062082 0.478333797 0.0214815099 1.21605301 100.243378
  - type: tabulated k
    data: |
        0.300 5.4970E-06
        0.310 3.8500E-06
        0.320 2.5318E-06
        0.330 1.5700E-06
        0.340 9.6503E-07
        0.350 5.8690E-07
        0.360 3.3384E-07
        0.370 1.8846E-07
        0.380 1.1715E-07
        0.390 7.8574E-08
        0.400 5.7818E-08
        0.420 4.3734E-08
        0.440 3.5190E-08
        0.460 2.9402E-08
        0.480 1.9146E-08
        0.500 1.1955E-08
        0.550 8.7623E-09
        0.600 1.9137E-08
        0.650 1.5541E-08
        0.700 1.1152E-08
        0.800 6.3694E-09
        0.900 1.4338E-08
        1.000 1.5931E-08
        1.200 9.5541E-09
        1.400 3.3473E-08
        1.600 5.1032E-08
        1.800 1.5844E-07
        2.000 4.5199E-07
        2.200 1.4217E-06
        2.400 5.8542E-06
CONDITIONS:
    temperature: 298
PROPERTIES:
    thermal_dispersion:
      - type: formula A
        coefficients: 3.27e-07 8.14e-09 -3.58e-11 5.41e-07 7.88e-10 0.181
    nd: 1.677900
    Vd: 54.887440
    glass_code: 678549
    glass_status: special
    density:
      - value: 3480
    thermal_expansion:
      - temperature_range: 243 343
        value: 7.6e-06
      - temperature_range: 293 573
        value: 9e-06
    dPgF: -0.0069
    resistance:
        climatic: 3.0
        acid: 53.2
        phosphate: 4.0