# 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: 0.33 2.4
    coefficients: 0 1.93889988 0.00996381644 0.39787919 0.036975114 1.49937713 107.951467
  - type: tabulated k
    data: |
        0.330 8.4529E-06
        0.340 3.8613E-06
        0.350 1.9868E-06
        0.360 1.1473E-06
        0.370 7.3156E-07
        0.380 4.9145E-07
        0.390 3.2699E-07
        0.400 2.5160E-07
        0.420 1.6792E-07
        0.440 1.2475E-07
        0.460 9.2677E-08
        0.480 6.5494E-08
        0.500 3.9989E-08
        0.550 8.7623E-09
        0.600 4.7770E-09
        0.650 5.1751E-09
        0.700 5.5732E-09
        0.800 6.3694E-09
        0.900 7.1656E-09
        1.000 7.9617E-09
        1.200 9.5541E-09
        1.400 1.1146E-08
        1.600 1.2739E-08
        1.800 5.7411E-08
        2.000 2.8909E-07
        2.200 9.5337E-07
        2.400 4.2617E-06
CONDITIONS:
    temperature: 298
PROPERTIES:
    thermal_dispersion:
      - type: formula A
        coefficients: 4.03e-06 1.06e-08 -9.93e-12 7.49e-07 7.76e-10 0.222
    nd: 1.854000
    Vd: 40.393284
    glass_status: special
    density:
      - value: 5090
    thermal_expansion:
      - temperature_range: 243 343
        value: 7e-06
    dPgF: -0.0084
    resistance:
        climatic: 4.0
        acid: 2.2
        phosphate: 1.0