# 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/2024/BDNL Sell Sheet_4_3_2024.pdf">BLACK DIAMOND BDNL4 Glass Datasheet (revision 2024-04-04)</a>
COMMENTS: |
    20 °C.
DATA:
  - type: tabulated n
    data: |
        1 2.754
        2 2.667
        4 2.647
        6 2.643
        8 2.639
        10 2.636
        12 2.632
        14 2.628
  - type: tabulated k
    data: |
        1.0 5.7000E-07
        1.5 4.6000E-07
        2.0 5.1000E-07
        2.5 5.8000E-07
        3.0 1.3300E-06
        3.5 7.4000E-07
        4.0 7.7000E-07
        4.5 9.1000E-07
        5.0 1.0100E-06
        5.5 1.1800E-06
        6.0 1.3500E-06
        6.5 1.7200E-06
        7.0 1.3400E-06
        7.5 1.6900E-06
        8.0 6.7000E-06
        8.5 1.8700E-06
        9.0 1.7000E-06
        9.5 1.9800E-06
        10.0 2.8700E-06
        10.5 6.0800E-06
        11.0 8.6700E-06
        11.5 1.7750E-05
        12.0 8.3910E-05
        12.5 2.6351E-04
        13.0 3.1314E-04
        13.5 1.5332E-04
        14.0 7.2500E-05
        14.5 4.7110E-05
        15.0 5.1120E-05
        15.5 4.2490E-05
CONDITIONS:
    temperature: 293
PROPERTIES:
    density:
      - value: 4500
    thermal_expansion:
      - value: 25.2e-06
    thermal_dispersion:
      - type: dn/dT
        temperature: 295
        wavelength_range: 8 12
        value: -16.3e-6
      - type: dn/dT
        temperature: 295
        wavelength_range: 3 5
        value: -14.3e-6
      - type: dn/dT
        temperature: 295
        wavelength_range: 1 2
        value: -9.7e-6
    transformation_temperature:
      - value: 478
    thermal_conductivity:
      - value: 0.17
    hardness:
      - type: Vickers
        value: 1.48e9
    youngs_modulus:
      - value: 14.2e9