# 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-26-english-us-10042017.pdf\">SCHOTT Infrared Chalcogenide Glasses - IRG 26 Product flyer (Version April 2017)</a>"
DATA:
  - type: formula 2
    wavelength_range: 0.85 12
    coefficients: 3.1934 3.5854 0.1852 2.2337 3398.08
  - type: tabulated k
    data: |
        1.0 9.7218E-07
        1.5 5.2464E-07
        2.0 4.5199E-07
        2.5 5.0368E-07
        3.0 1.4518E-06
        3.5 3.3625E-07
        4.0 2.2360E-07
        4.5 1.7950E-07
        5.0 1.9944E-07
        5.5 2.1939E-07
        6.0 2.8734E-07
        6.5 3.6335E-07
        7.0 2.2326E-07
        7.5 2.9916E-07
        8.0 4.4720E-07
        8.5 1.1598E-06
        9.0 4.2793E-06
        9.5 1.6817E-06
        10.0 2.8351E-06
        10.5 4.1980E-06
        11.0 2.7565E-06
        11.5 3.1656E-06
        12.0 5.2002E-06
        12.5 1.0702E-05
        13.0 2.8800E-05
        13.5 5.7598E-05
        14.0 9.1972E-05
        14.5 1.6858E-04
        15.0 2.8611E-04
        15.5 3.2801E-04
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 20.0 °C
    thermal_dispersion:
      - type: "Schott formula"
        coefficients: 2.63e-05 0 0 2.93e-05 0 3.15e-01
    density: 4.63 g/cm<sup>3</sup>
    thermal_expansion:
      - temperature_range: 20 100 °C
        coefficient: 21.4e-06 K<sup>-1</sup>
    specific_heat: 0.36 J/(g·K)
    thermal_conductivity:
      - value: 0.24 W/(m·K)
    transition_temperature: 185 °C
    Knoop_hardness: 1.04 GPa
    fracture_toughness: 0.285 MPa·m<sup>1/2</sup>
    Youngs_modulus: 18.3 GPa
