# 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: 0.365015 2.32542
    coefficients: 0 1.53013396 0.0114236857 0.24536228 0.0555101852 1.78233031 179.0743
  - type: tabulated k
    data: |
        0.350 1.2826E-05
        0.360 4.4709E-06
        0.370 1.5041E-06
        0.380 6.0010E-07
        0.390 3.1666E-07
        0.400 1.9696E-07
        0.420 1.0525E-07
        0.440 7.4313E-08
        0.460 5.9043E-08
        0.480 4.6114E-08
        0.500 3.5972E-08
        0.550 1.3150E-08
        0.600 1.9137E-08
        0.650 2.5928E-08
        0.700 1.6736E-08
        0.800 6.3694E-09
        0.900 7.1656E-09
        1.000 7.9617E-09
        1.200 9.5541E-09
        1.400 2.2304E-08
        1.600 6.3822E-08
        1.800 2.8938E-07
        2.000 6.1658E-07
        2.200 1.3271E-06
        2.400 2.2256E-06
CONDITIONS:
    temperature: 298
PROPERTIES:
    thermal_dispersion:
      - type: formula A
        coefficients: -6.17e-06 5.7e-09 -3.8e-11 9.99e-07 1.21e-09 0.26
    nd: 1.694529
    Vd: 30.655992
    glass_code: 689311
    density:
      - value: 2880
    thermal_expansion:
      - temperature_range: 243 343
        value: 1.01e-05
      - temperature_range: 293 573
        value: 1.3e-05
    dPgF: 0.0073
    resistance:
        climatic: 1.0
        acid: 1.0
        phosphate: 1.0