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Updated: Jun 16, 2026
10:12
Synchrotron X-ray Microdiffraction and Fluorescence Imaging of Mineral and Rock Samples
Published on: June 19, 2018
Summary
Lorentz line parameters were derived from reflectance data for various minerals and glass. These optical constants are essential for computational modeling and include detailed fitting and statistical methods.
Area of Science:
- Materials Science
- Solid State Physics
- Spectroscopy
Background:
- Accurate optical constants are crucial for modeling material properties.
- Reflectance spectroscopy is a common method for deriving optical properties.
- Lorentzian models are frequently used to describe optical resonances.
Purpose of the Study:
- To empirically derive Lorentz line parameters from reflectance data.
- To provide optical constants for muscovite mica, anorthosite, pyroxenite, garnet, and glass.
- To detail a novel least-squares fitting method and statistical analysis for parameter estimation.
Main Methods:
- Empirical derivation of Lorentz line parameters from measured reflectance data.
- Application of a novel least-squares fitting technique to reflectance spectra.
- Statistical procedures for estimating the standard deviations of derived parameters.
Main Results:
- Lorentz line parameters were successfully determined for muscovite mica, anorthosite, diopsidic pyroxenite, almandite-pyrope garnet, and soda lime glass.
- The derived parameters serve as a valuable starting point for optical constant calculations.
- A detailed description of the fitting and statistical methods is provided.
Conclusions:
- The empirically derived Lorentz line parameters are reliable for computational applications.
- The presented methodology offers a robust approach for analyzing reflectance data.
- This work contributes essential optical data for diverse geological and material science applications.
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