# this file is part of refractiveindex.info database
# refractiveindex.info database is in the public domain
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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: "lead containing glass type. suitable for precision molding        "
DATA:
  - type: formula 2 
    range: 0.37 2.5
    coefficients: 0 1.81651371 0.0143704198 0.428893641 0.0592801172 1.07186278 121.419942
  - type: tabulated k
    data: |
        0.370 5.4237E-06
        0.380 1.9589E-06
        0.390 9.9127E-07
        0.400 5.2905E-07
        0.405 4.0571E-07
        0.420 2.0164E-07
        0.436 1.0072E-07
        0.460 4.7621E-08
        0.500 2.2439E-08
        0.546 1.0459E-08
        0.580 1.1111E-08
        0.620 1.1877E-08
        0.660 1.2643E-08
        0.700 8.9305E-09
        1.060 1.0137E-08
        1.530 4.4030E-08
        1.970 4.5507E-07
        2.325 1.7445E-06
        2.500 2.2893E-06
SPECS:
    n_is_absolute: false
    λ_is_vacuum: false
    temperature: 20.0 °C
    coefficients_of_thermal_dispersion: 7.26e-06 1.88e-08 -5.14e-11 1.96e-06 1.79e-09 0.276
    n_d: 1.84666
    V_d: 23.83
    glass_code: 847238.551
    glass_status: standard
    density: 5.51 g/cm<sup>3</sup>
    coefficient_of_thermal_expansion_1: 8.3e-06 K<sup>-1</sup>
    coefficient_of_thermal_expansion_2: 9.2e-06 K<sup>-1</sup>
    ΔP_gF: 0.0123
    climatic_resistance: 2.0
    stain_resistance: 5.0
    acid_resistance: 52.3
    alkali_resistance: 2.3
    phosphate_resistance: 4.3
