# 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: 0.28 2.4
    coefficients: 0 1.17776146 0.00557618243 0.634591345 0.0206821469 1.20435649 99.6322776
  - type: tabulated k
    data: |
        0.280 1.0261E-05
        0.290 6.4926E-06
        0.300 4.5290E-06
        0.310 3.1403E-06
        0.320 2.0334E-06
        0.330 1.2981E-06
        0.340 8.1468E-07
        0.350 4.8561E-07
        0.360 2.6075E-07
        0.370 1.5413E-07
        0.380 9.5226E-08
        0.390 6.5868E-08
        0.400 5.1341E-08
        0.420 3.6968E-08
        0.440 3.1655E-08
        0.460 2.5714E-08
        0.480 1.9146E-08
        0.500 1.1955E-08
        0.550 8.7623E-09
        0.600 1.4345E-08
        0.650 1.5541E-08
        0.700 1.1152E-08
        0.800 6.3694E-09
        0.900 7.1656E-09
        1.000 7.9617E-09
        1.200 9.5541E-09
        1.400 4.4653E-08
        1.600 6.3822E-08
        1.800 1.7293E-07
        2.000 5.0119E-07
        2.200 1.4979E-06
        2.400 6.2740E-06
CONDITIONS:
    temperature: 298
PROPERTIES:
    thermal_dispersion:
      - type: formula A
        coefficients: 1.27e-06 9.45e-09 -3.49e-11 5.82e-07 6.14e-10 0.192
    nd: 1.693500
    Vd: 53.185799
    glass_code: 694532
    density:
      - value: 3690
    thermal_expansion:
      - temperature_range: 243 343
        value: 7.6e-06
      - temperature_range: 293 573
        value: 9.2e-06
    dPgF: -0.0072
    resistance:
        climatic: 2.0
        acid: 53.2
        phosphate: 4.0