# 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-KZFS4"
DATA:
  - type: formula 2 
    range: 0.31 2.5
    coefficients: 0 1.37994218 0.00891159699 0.168496708 0.040533407 0.874885726 69.6628237
  - type: tabulated k
    data: |
        0.310 3.4601E-06
        0.320 1.8667E-06
        0.334 7.5840E-07
        0.350 3.6598E-07
        0.365 1.6180E-07
        0.370 1.2409E-07
        0.380 7.6131E-08
        0.390 4.8093E-08
        0.400 3.3542E-08
        0.405 2.8678E-08
        0.420 1.8849E-08
        0.436 1.5351E-08
        0.460 1.1761E-08
        0.500 7.9777E-09
        0.546 8.7117E-09
        0.580 9.2541E-09
        0.620 9.8924E-09
        0.660 1.0531E-08
        0.700 1.1169E-08
        1.060 1.6913E-08
        1.530 3.0134E-07
        1.970 1.3214E-06
        2.325 9.4208E-06
        2.500 2.3839E-05
SPECS:
    n_is_absolute: false
    λ_is_vacuum: false
    temperature: 20.0 °C
    coefficients_of_thermal_dispersion: 6.01e-06 1.3e-08 -7.94e-11 4.05e-07 7.23e-10 0.272
    n_d: 1.6134
    V_d: 44.29
    glass_code: 613443.320
    glass_status: preferred
    density: 3.2 g/cm<sup>3</sup>
    coefficient_of_thermal_expansion_1: 4.5e-06 K<sup>-1</sup>
    coefficient_of_thermal_expansion_2: 5.5e-06 K<sup>-1</sup>
    ΔP_gF: -0.0086
    climatic_resistance: 3.0
    stain_resistance: 2.0
    acid_resistance: 52.3
    alkali_resistance: 4.3
    phosphate_resistance: 4.3
