Results 31 to 40 of about 14,521 (250)
Revista Brasileira de Ciência do Solo, 2019 Variations in chemical and mineralogical properties of a soil can occur at short vertical and horizontal distances. The objective of the present study was to evaluate the chemical and mineralogical soil properties of different aggregate classes from ...
Rolff Vladimir Mitton +2 more
doaj +1 more source
, 2011 The Gauge-Including Projector Augmented Wave (GIPAW) method, within the Density Functional Theory (DFT) Generalized Gradient Approximation (GGA) framework, is applied to compute solid state NMR parameters for $^{27}Al$ in the $\alpha$, $\theta$, and ...
A. Ramos-Gallardo +8 more
core +1 more source
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
doaj +1 more source
International Journal of Electrochemical Science, 2018 In this work, gibbsite and boehmite were used as additives of gel valve regulated lead acid battery for the first time in the literature. Optimum amounts of additives were determined as 0.6wt% for each species by using of cyclic voltammetric and ...
Metin GENÇTEN
doaj +1 more source
Phase stacking diagram of colloidal mixtures under gravity [PDF]
, 2013 The observation of stacks of distinct layers in a colloidal or liquid mixture in sedimentation-diffusion equilibrium is a striking consequence of bulk phase separation.
Heras, Daniel de las, Schmidt, Matthias
core +2 more sources
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
doaj +1 more source
Coating of Gibbsite Platelets with Silica [PDF]
Chemistry of Materials, 2004 In this work, gibbsite particles are synthesized from aluminum alkoxides in an acidic environment at 85 °C. After centrifugation, coating with silica is investigated following two different methods. Practical aspects and the feasibility to produce significant amounts of material are studied. The first method, analogous to a procedure used for boehmite,
openaire +3 more sources
On phase behavior and dynamical signatures of charged colloidal platelets
, 2013 We investigate the competition between anisotropic excluded-volume and repulsive electrostatic interactions in suspensions of thin charged colloidal discs, by means of Monte-Carlo simulations and dynamical characterization of the structures found.
Davidson, P. +4 more
core +2 more sources
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
doaj +1 more source
A comparative study of experimental configurations in synchrotron pair distribution function [PDF]
, 2019 The identification and quantification of amorphous components and nanocrystalline phases with very small crystal sizes, smaller than ~3 nm, within samples containing crystalline phases is very challenging.
Ana Cuesta +12 more
core +2 more sources