Here you will find code developed by our group to determine the optical constants of minerals from visible to far-IR wavelengths. If you use these codes, please reference the appropriate papers listed below.
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Hapke VNIR Optical Constant Code
This .zip file contains Matlab programs and files used to determine wavelength-dependent visible-to-near-infrared (VNIR) refractive indices. Input files for bassanite (Ye et al. 2021) are included as examples. This code is may only be used with spectra referenced to a calibrated Spectralon standard. This code requires the Matlab Optimization Toolbox. Measurements required to run this code are VNIR spectra of three size separates at seven phase angles each. Instructions on running the code can be found in MASTERPROGRAM_Byt2_B.m. Any questions about the code can be addressed to Dr. Elizabeth Sklute at elizabeth.sklute@gmail.com. (Sklute et al., 2015)
MIR Optical Constant Code for Orthorhombic and Higher Symmetry Minerals
This .zip file contains Matlab programs and files used to determine wavelength dependent mid-IR refractive indices. This code is appropriate for use with specular reflectance spectra of oriented mineral single crystals with orthorhombic or higher symmetry or pure pressed pellets of mineral powders. An input file for a pressed pellet of synthetic F080 olivine is included as an example. Any questions about the code can be addressed to Tim Glotch at timothy.glotch@stonybrook.edu. (Glotch et al., 2007; Glotch and Rossman, 2009)
This .zip file contains Matlab programs and files used to determine wavelength dependent mid-IR refractive indices. This code is appropriate for use with specular reflectance spectra of oriented mineral single crystals with monoclinic symmetry. Input files for oriented orthoclase single crystals are included as examples. Any questions about the code can be addressed to Tim Glotch at timothy.glotch@stonybrook.edu. (Arnold et al., 2014 )
This .zip file contains Matlab programs and files used to determine wavelength dependent mid-IR refractive indices. This code is appropriate for use with specular reflectance spectra of oriented mineral single crystals with triclinic symmetry. Input files for oriented labradorite single crystals are included as examples. Any questions about the code can be addressed to Tim Glotch at timothy.glotch@stonybrook.edu. (Ye et al., 2019 )
