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15 de sept. de 2018 · Mineral compositions and structures in soil clay fractions can reflect the pedogenesis and the pedoenvironments of the natural soils. However, the simultaneous quantification and structural analysis of all phases in soils by X-ray diffraction are difficult, mainly due to overlapping reflections.
1 de ene. de 2023 · Michael L. Thompson. Request PDF | On Jan 1, 2023, Darrell G. Schulze published Mineral components of the soil clay fraction | Find, read and cite all the research you need on...
A summary of the mineralogical composition of the clay fraction for the red-yellow, red, and dark-red topsoils is shown in Table 8. Kaolinite was the main constituent of the clay fraction (33.8%) followed by gibbsite (23.4%), goethite and hematite (9.1%), amorphous Al 2 O 3 (4.0%), and amorphous SiO 2 (2.1%).
1 de jul. de 2021 · The study revealed that the dominant clay mineral in the clay fractions was kaolinite with highest percentage in clay fractions developed from basalt. Other minerals present were quartz, plagioclase, microcline, muscovite/illite, anatase, goethite, hematite, gibbsite, chlorite, and actinolite.
22 de ago. de 2017 · The data of soil clay and its mineralogical composition were gathered through a literature survey and aggregated by soil orders of the Soil Taxonomy for each of the ten groups: gibbsite,...
30 de sept. de 2021 · Soil clay minerals dominate the colloidal fraction and specific surface area () of soil. Clay minerals exhibit a wide range of microstructures and hydration responses that affect soil macroscopic hydraulic, chemical, and mechanical properties.
One of the main mineral components found in the clay fraction of most Brazilian soils of low activity clay is kaolinite, as well as iron and aluminum oxides ( Resende et al., 2005 ). In contrast, soils with high activity clay commonly have not only kaolinite, but also 2:1 minerals and interlayers of mica, vermiculite, and smectite.
