Results 21 to 30 of about 1,258 (180)
Effect of Dry Grinding on Gibbsite [PDF]
Bulletin of the Chemical Society of Japan, 1959 Abstract The effect of dry grinding on gibbsite was examined by X-ray diffraction, X-ray small angle diffraction and differential thermal analysis. It has been found that there are two sorts of structural change in the process of dry grinding. One, which occurs early in this process, is the slip of layers.
Goro Yamaguchi, Kenichi Sakamoto
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Acta Scientiarum. Agronomy, 2014 The low phosphorus availability in tropical and subtropical soils, normally related to adsorption of phosphate to the minerals surfaces, can be attenuated when organic matter (OM) accumulates in the soils.
Jessé Rodrigo Fink +4 more
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Mineralogy of the clay fraction of Alfisols in two slope curvatures: III - spatial variability
Revista Brasileira de Ciência do Solo, 2013 A good knowledge of the spatial distribution of clay minerals in the landscape facilitates the understanding of the influence of relief on the content and crystallographic attributes of soil minerals such as goethite, hematite, kaolinite and gibbsite ...
Livia Arantes Camargo +2 more
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Pesquisa Agropecuária Brasileira, 2009 The objective of this work was to assess the relationship between macrofauna, mineralogy and exchangeable calcium and magnesium in Cerrado Oxisols under pasture.
Pedro Rodolfo Siqueira Vendrame +4 more
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First discovery of gibbsite in Biryuzakan turquoise deposit, Northern Tajikistan
Известия высших учебных заведений: Геология и разведкаBackground. In the quartz veins of the Biryuzakan turquoise deposit, a hydrothermal mineralization of varicolored gibbsite was discovered for the first time. The gibbsite varies from light- to dark blue in color, resembling turquoise. Aim.
Sh. T. Vosihov +2 more
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Journal of the Geological Survey of Brazil, 2023 The Jequié Block is located at the northeastern portion of the São Francisco Craton and represents the Archean tectonic paleoplate that hosts the Jequié Complex.
Daniel Augusto de Miranda +6 more
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Iron Isotopes Reveal Fe Export Driven by Change of Tropical Weathering Regime
Geophysical Research Letters, Volume 53, Issue 16, 28 August 2026.Abstract Unraveling paleoenvironmental signals recorded in laterites is crucial for quantifying weathering‐driven elemental fluxes at the Earth's surface. New stable iron isotope data (δ56Fe), combined with (U‐Th)/He ages in Fe‐oxides from a ferruginous duricrust from French Guiana, reveal the response of Fe hosted in laterite to past changes in ...
Z. Fekiacova‐Castanet +11 more
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Iranian Journal of Materials Science and Engineering, 2020 Overusing nitrogen fertilizer causes some serious problems for water resources, soil, and agriculture products. Researchers have been trying to develop effective means which may use less amount of fertilizers containing nitrogen.
S.M. Moussavi Janbesarayi +4 more
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Global Challenges, Volume 10, Issue 8, August 2026.Short‐term CO2–water reactions show that crystalline basalt undergoes more extensive carbonation than basaltic glass and is associated with detectable H2 and higher CO and CH4 concentrations. This contrast is consistent with the greater early reactivity of Fe‐ and Mg‐bearing crystalline phases, indicating that basalt mineralogy influences coupled ...
Andrea Pierozzi +5 more
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Materials Research, 2007 A new procedure was used to prepare a microcrystalline powder constituted by thin euhedral hexagonal gibbsite plates, 0.2 to 0.6 µm in diameter and 32 nm thick. The powder, fired between 200 and 1000 °C, produced chi and kappa transition aluminas.
Antonio Carlos Vieira Coelho +4 more
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