Results 101 to 110 of about 18,650 (253)

Precipitation of spherical boehmite from concentrated sodium aluminate solution by adding gibbsite as seed

open access: yesInternational Journal of Minerals, Metallurgy, and Materials, 2017
The precipitation of spherical boehmite was studied by surface energy calculations, measurements of precipitation ratios, Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy, and transmission electron microscopy.
Gui-hua Liu   +5 more
semanticscholar   +1 more source

La gibbsite dans les sols dérivés de roches volcaniques basiques à Madagascar [PDF]

open access: yes, 1956
Ségalen Pierre. La gibbsite dans les sols dérivés de roches volcaniques basiques à Madagascar. In: Bulletin du Groupe français des argiles. Tome 8, nouvelle série n°3, 1956. pp.
Ségalen, Pierre
core   +1 more source

Chemical weathering of the volcanic soils of Isla Santa Cruz (Galápagos Islands, Ecuador) [PDF]

open access: yes, 2014
We present a study on weathering of volcanic soils using 43 profiles (131 horizons) sampled in Santa Cruz Island (Galapagos Islands). Several weathering indices, based on chemical composition, are used. Since the geological material is highly homogeneous
Ferro, C   +4 more
core   +1 more source

Fluoride removal by adsorption on thermally treated lateritic soils

open access: yesBulletin of the Chemical Society of Ethiopia, 2012
The ability of lateritic soils to remove fluoride from water has been studied. Important issues considered in the study include the relation between the mineral composition of soils and their ability to remove fluoride, the effect of thermal treatment of
Kefyalew Gomoro   +3 more
doaj  

Frustration of the isotropic-columnar phase transition of colloidal hard platelets by a transient cubatic phase

open access: yes, 2011
Using simulations and theory, we show that the cubatic phase is metastable for three model hard platelets. The locally favored structures of perpendicular particle stacks in the fluid prevent the formation of the columnar phase through geometric ...
Alessandro Patti   +4 more
core   +2 more sources

Uranyl interaction with the hydrated (0001) basal face of gibbsite: A combined theoretical and spectroscopic study [PDF]

open access: yes, 2008
International audienceThe sorption of uranyl cations and water molecules on the basal (001) face of gibbsite was studied by combining vibrational and fluorescence spectroscopies together with density functional theory ͑DFT͒ computations.
Drot, Romuald   +5 more
core   +3 more sources

Formulation of calcium dialuminate (CaO·2Al2O3) refractory cement from local bauxite

open access: yesJournal of Asian Ceramic Societies, 2015
Three types of bauxites containing aluminum hydroxide of 58.1% gibbsite and 19.3% boehmite for BX3, 95.5% of gibbsite for BX55 and 84.5% of gibbsite for BX8 were used with lime at 95% of CaO through solid state sintering in one stage to prepare a ...
A.B. Tchamba   +3 more
doaj   +1 more source

Clay Mineralogy of Red Clay Deposits from the Central Carpathian Basin (Hungary): Implications for Plio/Pleistocene Chemical Weathering and Paleoclimate [PDF]

open access: yes, 2013
Geochemical and mineralogical studies of palaeosols provide essential information for palaeoclimatic and palaeoenvironmental interpretation of continental deposits and can present a proxy for palaeoclimate.
Kovács, János   +5 more
core  

Phase behaviour of binary mixtures of diamagnetic colloidal platelets in an external magnetic field

open access: yes, 2011
Using fundamental measure density functional theory we investigate paranematic-nematic and nematic-nematic phase coexistence in binary mixtures of circular platelets with vanishing thicknesses.
Connolly J   +9 more
core   +1 more source

Validation of a Standard Operating Procedure (SOP) for Forensic Soils Investigation in Brazil

open access: yesRevista Brasileira de Ciência do Solo
Soil traces are useful as forensic evidence due to their potential to transfer and adhere to different types of surfaces on a range of objects or persons. Several works have been developed in forensic soils, under different analytical approaches. However,
Samara Alves Testoni   +4 more
doaj   +1 more source

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