Stony Brook University Vibrational Spectroscopy Laboratory

We are currently working to determine the optical constants (n and k) of many minerals at various orientations. For uniaxial minerals, we determine n and k for the O and E rays. For other minerals, we determine the three principal complex refractive indices. We determine n and k by acquiring mid-IR emissivity or reflectance spectra and applying dispersion theory to generate optical constants that provide best-fit models to the measured spectra. Check back often to find new data. In the data files, the x axis is in wavenumber (cm-1) units.

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Mineral Optical Constants

Chloride (Glotch et al., in press)

Halite


Clinopyroxenes (Arnold et al., 2014)

Augite 1

Augite 2

Diopside

Hedenbergite


K-Feldspar (Arnold et al., 2014)

Orthoclase


Oxides (Glotch et al., 2006; Glotch and Rossman, 2009)

Hematite

Magnetite

Maghemite

Goethite

Lepidocrocite

Akaganeite

Ferrihydrite


Phyllosilicates (Glotch et al., 2007)

Montmorillonite (SWy-1)

Beidellite (SBld-1)

Nontronite (NAu-1)

Hectorite (SHCa-1)

Saponite (SpNv-1)

Illite (IMt-1)

Illite-Smectite (IsMt-1)

Kaolinite (KGa-1)

Halloysite (HWw-1)

Serpentine (BUR-1690)

Cronstedite (112792) Sample not well characterized. Use with caution!


Silica Polymorphs (Unpublished)

Tridymite

Opal-A

Opal-CT