text: # 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: "1) <a href=\"http://refractiveindex.info/download/data/2015/ohara_2015-12-01.pdf\">OHARA optical glass datasheets 2015-12-01</a><br>2) <a href=\"http://refractiveindex.info/download/data/2015/OHARA_151201.agf\">OHARA Zemax catalog 2015-12-01</a>"
  COMMENTS: "Low Softening Temperature"
  DATA:
    - type: formula 2 
      range: 0.34 2.4
      coefficients: 0 1.83606127 0.00981969903 0.341720032 0.0385636264 1.35280173 107.04553
    - type: tabulated k
      data: |
          0.340 4.3545E-06
          0.350 1.7162E-06
          0.360 7.8620E-07
          0.370 4.1004E-07
          0.380 2.5214E-07
          0.390 1.5919E-07
          0.400 1.1340E-07
          0.420 7.0935E-08
          0.440 5.2919E-08
          0.460 3.6790E-08
          0.480 2.6832E-08
          0.500 1.5947E-08
          0.550 8.7623E-09
          0.600 9.5589E-09
          0.650 1.0355E-08
          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 2.2304E-08
          1.600 3.8255E-08
          1.800 1.1505E-07
          2.000 4.0295E-07
          2.200 1.0460E-06
          2.400 4.5020E-06
  INFO:
      n_is_absolute: false
      λ_is_vacuum: false
      temperature: 25.0 °C
      coefficients_of_thermal_dispersion: 8.14e-06 9.68e-09 -3.1e-12 8.24e-07 8.84e-10 0.23
      n_d: 1.808350
      V_d: 40.548503
      density: 4.62 g/cm<sup>3</sup>
      coefficient_of_thermal_expansion_1: 6e-06 K<sup>-1</sup>
      ΔP_gF: -0.007
      climatic_resistance: 2.0
      acid_resistance: 51.3
      phosphate_resistance: 2.2
  