# 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: "inquiry glass        "
DATA:
  - type: formula 2 
    wavelength_range: 0.46 2.5
    coefficients: 0 1.62113942 0.0113478992 0.506586092 0.0535840223 10.4032298 1118.83658
  - type: tabulated k
    data: |
        0.460 3.6982E-06
        0.500 1.7645E-06
        0.546 3.7699E-07
        0.580 1.9862E-07
        0.620 1.4110E-07
        0.660 1.0809E-07
        0.700 8.6611E-08
        1.060 2.0492E-08
        1.530 6.2449E-08
        1.970 5.5915E-07
        2.325 2.4225E-06
        2.500 3.3039E-06
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 20.0 °C
    thermal_dispersion:
      - type: "Schott formula"
        coefficients: 6.9e-06 1.76e-08 -3.17e-11 1.89e-06 1.5e-09 0.256
    nd: 1.80906
    Vd: 25.28
    glass_code: 809253.520
    glass_status: special
    density: 5.2 g/cm<sup>3</sup>
    thermal_expansion:
      - temperature_range: -30 70 °C
        coefficient: 7.8e-06 K<sup>-1</sup>
    dPgF: 0.108
    climatic_resistance: 4.0
    stain_resistance: 3.0
    acid_resistance: 51.3
    alkali_resistance: 2.3
    phosphate_resistance: 3.3
