# 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=\"http://refractiveindex.info/download/data/2017/schott_2017-01-20b.agf\">SCHOTT Zemax catalog 2017-01-20b</a> (obtained from <a href=\"http://www.schott.com/advanced_optics/english/download/\">http://www.schott.com</a>)<br>See also <a href=\"http://refractiveindex.info/download/data/2017/schott_2017-01-20.pdf\">SCHOTT glass data sheets</a>"
COMMENTS: "was replaced by N-LASF9"
DATA:
  - type: formula 2 
    wavelength_range: 0.365 2.5
    coefficients: 0 1.97888194 0.0118537266 0.320435298 0.052738177 1.92900751 166.25654
  - type: tabulated k
    data: |
        0.365 4.4344E-06
        0.370 3.0665E-06
        0.380 1.6529E-06
        0.390 1.0477E-06
        0.400 7.3145E-07
        0.405 6.2670E-07
        0.420 4.2257E-07
        0.436 3.0622E-07
        0.460 2.1066E-07
        0.500 1.1379E-07
        0.546 5.2937E-08
        0.580 3.9183E-08
        0.620 3.5847E-08
        0.660 3.1751E-08
        0.700 2.6900E-08
        1.060 1.0137E-08
        1.530 1.9520E-08
        1.970 1.9100E-07
        2.325 1.0306E-06
        2.500 2.2893E-06
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 20.0 °C
    thermal_dispersion:
      - type: "Schott formula"
        coefficients: 9.44e-07 1.14e-08 -1.87e-11 9.22e-07 1.22e-09 0.255
    nd: 1.85025
    Vd: 32.17
    glass_code: 850322.444
    glass_status: preferred
    density: 4.44 g/cm<sup>3</sup>
    thermal_expansion:
      - temperature_range: -30 70 °C
        coefficient: 7.4e-06 K<sup>-1</sup>
      - temperature_range: 20 300 °C
        coefficient: 8.4e-06 K<sup>-1</sup>
    dPgF: 0.0036
    climatic_resistance: 2.0
    stain_resistance: 0.0
    acid_resistance: 2.0
    alkali_resistance: 1.0
    phosphate_resistance: 1.0
