# 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: 0.365 2.325
    coefficients: 0 1.44196269 0.00731826717 0.617507311 0.0245370775 1.21890079 105.976009
  - type: tabulated k
    data: |
        0.300 3.9647E-06
        0.310 2.8892E-06
        0.320 2.0334E-06
        0.330 1.3415E-06
        0.340 8.5149E-07
        0.350 5.1897E-07
        0.360 3.0184E-07
        0.370 1.7905E-07
        0.380 1.1087E-07
        0.390 7.2215E-08
        0.400 5.1341E-08
        0.420 3.0216E-08
        0.440 2.1072E-08
        0.460 1.4672E-08
        0.480 7.6471E-09
        0.500 3.9809E-09
        0.550 4.3790E-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 3.2154E-07
        2.200 8.9799E-07
        2.400 3.7901E-06
CONDITIONS:
    temperature: 298
PROPERTIES:
    thermal_dispersion:
      - type: formula A
        coefficients: 6.1e-06 9.05e-09 -1.35e-11 7.87e-07 7.19e-10 0.19
    nd: 1.770300
    Vd: 47.401904
    glass_status: preferred
    density:
      - value: 4340
    thermal_expansion:
      - temperature_range: 243 343
        value: 7.1e-06
    dPgF: -0.0086
    resistance:
        climatic: 2.0
        acid: 51.2
        phosphate: 2.0