# 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-infrared-chalcogenide-glasses-irg-27-english-us-11042017.pdf\">SCHOTT Infrared Chalcogenide Glasses - IRG 27 Product flyer (Version April 2017)</a>"
DATA:
  - type: formula 2
    wavelength_range: 0.6 12
    coefficients: 1.4005 3.4429 0.0871 1.0394 805.5
  - type: tabulated k
    data: |
        0.6 1.3595E-05
        0.7 3.8631E-07
        0.8 2.7981E-07
        1.0 2.2600E-07
        1.5 1.5619E-07
        2.0 1.5996E-07
        2.5 1.7986E-07
        3.0 3.6081E-07
        3.5 3.0807E-07
        4.0 4.3963E-06
        4.5 2.8763E-07
        5.0 1.9944E-07
        5.5 2.1939E-07
        6.0 3.8351E-07
        6.5 5.1986E-07
        7.0 1.2392E-06
        7.5 2.1263E-06
        8.0 2.2681E-06
        8.5 6.3793E-06
        9.0 2.6265E-05
        9.5 5.7401E-05
        10.0 7.5340E-05
        10.5 6.6906E-05
        11.0 7.2064E-05
        11.5 1.1584E-04
        12.0 2.0408E-04
        12.5 4.1133E-04
        12.7 6.9812E-04
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 20.0 °C
    thermal_dispersion:
      - type: "Schott formula"
        coefficients: -3.89e-06 0 0 1.77e-05 0 6.04e-02
    density: 3.20 g/cm<sup>3</sup>
    thermal_expansion:
      - temperature_range: 20 100 °C
        coefficient: 22.5e-06 K<sup>-1</sup>
    specific_heat: 0.482 J/(g·K)
    thermal_conductivity:
      - temperature: 25 °C
        value: 0.33 W/(m·K)
    transition_temperature: 197 °C
    Knoop_hardness: 1.11 GPa
    fracture_toughness: 0.285 MPa·m<sup>1/2</sup>
    Youngs_modulus: 16.77 GPa
