Open AccessModel near‐infrared optical constants of olivine and pyroxene as a function of iron content
Author(s) -
Lucey Paul G.
Publication year - 1998
Publication title -
journal of geophysical research: planets
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.67
H-Index - 298
eISSN - 2156-2202
pISSN - 0148-0227
DOI - 10.1029/97je03145
Subject(s) - pyroxene , olivine , spectral line , radiative transfer , refractive index , wavelength , mineralogy , grain size , analytical chemistry (journal) , geology , materials science , chemistry , physics , optics , chromatography , astronomy , geomorphology
The imaginary coefficients of the complex index of refraction of olivine, low‐Ca orthopyroxene, and high‐Ca clinopyroxene are derived as a function of iron content and wavelength over the spectral region 0.4 to 2.5 μm from reflectance spectra of powders and Hapke radiative transfer theory. Reflectance spectra as a function of composition and grain size are computed and compared. I find that while spectral effects of variations in these parameters are similar, they are distinguishable. Variations in iron content do not explain all the observed spectral variations in the spectra of the samples investigated.