# 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-SF15"
DATA:
  - type: formula 2 
    range: 0.37 2.5
    coefficients: 0 1.53925927 0.0119307961 0.247620926 0.0556077536 1.03816409 116.416747
  - type: tabulated k
    data: |
        0.370 5.4237E-06
        0.380 1.9467E-06
        0.390 7.1979E-07
        0.400 3.1635E-07
        0.405 2.0951E-07
        0.420 8.2721E-08
        0.436 4.9445E-08
        0.460 2.9581E-08
        0.500 1.5996E-08
        0.546 1.0459E-08
        0.580 9.2541E-09
        0.620 1.1877E-08
        0.660 1.4758E-08
        0.700 1.1169E-08
        1.060 1.0137E-08
        1.530 6.3727E-08
        1.970 5.9139E-07
        2.325 2.1291E-06
        2.500 3.1869E-06
SPECS:
    n_is_absolute: false
    λ_is_vacuum: false
    temperature: 20.0 °C
    coefficients_of_thermal_dispersion: 2.91e-06 1.69e-08 -3.77e-11 1.1e-06 1.07e-09 0.278
    n_d: 1.69895
    V_d: 30.07
    glass_code: 699301.406
    glass_status: preferred
    density: 4.06 g/cm<sup>3</sup>
    coefficient_of_thermal_expansion_1: 7.9e-06 K<sup>-1</sup>
    coefficient_of_thermal_expansion_2: 8.9e-06 K<sup>-1</sup>
    ΔP_gF: 0.0066
    climatic_resistance: 1.0
    stain_resistance: 0.0
    acid_resistance: 1.0
    alkali_resistance: 1.2
    phosphate_resistance: 2.3
