Investigations into Soil Composition and Texture Using Infrared Spectroscopy (2–14 𝝁m)

Table 1

Accessible windows within infrared spectral regions and their diagnostic compositional elements commonly found in soils.

SWIR; 1.0–2.5 𝜇m	MIR; 3–5 𝜇m	TIR; 7–14 𝜇m
Clay minerals (e.g., kaolinite, illite, montmorillonite), sulphates (e.g., gypsum) and carbonate (e.g., calcite) minerals	Organic carbon (e.g., lignin, cellulose), quartz, kaolinite	Quartz (including silt versus coarse sand), kaolinite, illite/montmorillonite, cellulose.