# 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="https://refractiveindex.info/download/data/2017/schott_2017-01-20b.agf">SCHOTT Zemax catalog 2017-01-20b</a> (obtained from <a href="https://www.schott.com/en-us/products/optical-glass-p1000267/downloads/">http://www.schott.com</a>)<br>See also <a href="https://refractiveindex.info/download/data/2017/schott_2017-01-20.pdf">SCHOTT glass data sheets</a>
COMMENTS: |
    was replaced by N-LAK12 
DATA:
  - type: formula 2
    wavelength_range: 0.32 2.5
    coefficients: 0 1.28115389 0.00636439821 0.482607607 0.0213764262 1.16553538 93.2771532
  - type: tabulated k
    data: |
        0.320 2.5727E-06
        0.334 1.5172E-06
        0.350 6.8648E-07
        0.365 3.0366E-07
        0.370 2.3372E-07
        0.380 1.4096E-07
        0.390 9.0090E-08
        0.400 6.1294E-08
        0.405 5.5314E-08
        0.420 4.6245E-08
        0.436 4.2272E-08
        0.460 3.4071E-08
        0.500 1.7604E-08
        0.546 1.3084E-08
        0.580 1.4829E-08
        0.620 1.5852E-08
        0.660 1.4758E-08
        0.700 1.5652E-08
        1.060 2.7101E-08
        1.530 8.8461E-08
        1.970 5.9139E-07
        2.325 4.4244E-06
        2.500 1.0720E-05
CONDITIONS:
    temperature: 293
PROPERTIES:
    thermal_dispersion:
      - type: formula A
        coefficients: 2.26e-06 1.05e-08 -8.4e-12 4.57e-07 5.86e-10 0.21
    nd: 1.6779
    Vd: 54.92
    glass_code: 678549.332
    glass_status: preferred
    density:
      - value: 3320
    thermal_expansion:
      - temperature_range: 243 343
        value: 6.8e-06
      - temperature_range: 293 573
        value: 8e-06
    dPgF: -0.0062
    resistance:
        climatic: 3.0
        stain: 3.0
        acid: 53.3
        alkali: 2.2
        phosphate: 3.3