Review Article
Visible and Near-Infrared Reflectance Spectroscopy for Investigating Soil Mineralogy: A Review
Figure 3
Raw spectra for goethite (a) and hematite (b) and the first-derivative spectra of goethite (c) and hematite (d) (modified from Zheng et al. [39]).
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(b) |
(c) |
(d) |