# 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 2.53279005 0.0186909889 0.583375125 0.0765409078 1.5299288 112.197368
  - type: tabulated k
    data: |
        0.420 3.7054E-06
        0.440 6.1048E-07
        0.460 1.9162E-07
        0.480 1.0063E-07
        0.500 6.8222E-08
        0.550 4.8411E-08
        0.600 6.7317E-08
        0.650 7.2927E-08
        0.700 6.7249E-08
        0.800 5.7555E-08
        0.900 2.1518E-08
        1.000 3.1895E-08
        1.200 3.8274E-08
        1.400 4.4653E-08
        1.600 1.1511E-07
        1.800 2.3104E-07
        2.000 5.1762E-07
        2.200 1.6319E-06
        2.400 4.0245E-06
CONDITIONS:
    temperature: 298
PROPERTIES:
    thermal_dispersion:
      - type: formula A
        coefficients: 1.61e-05 2.23e-08 -5.18e-11 3.36e-06 3.2e-09 0.311
    nd: 2.102999
    Vd: 18.051064
    glass_status: preferred
    density:
      - value: 6740
    thermal_expansion:
      - temperature_range: 243 343
        value: 8.4e-06
    dPgF: 0.0439
    resistance:
        climatic: 2.0
        acid: 52.1
        phosphate: 2.0