Phyllosilicate
Mostrando 1-6 de 6 artigos, teses e dissertações.
-
1. Characterization of micaceous minerals occurring in phosphate ores in Brazil: emphasis on the interstratified phyllosilicates
Abstract Micaceous minerals were characterized in three phosphatic ores from mines in Western Minas Gerais State, Brazil, all having complex chemical and mineralogical compositions, with emphasis on interstratified phyllosilicates. Knowledge of the relationship between the physical and chemical characteristics of the phyllosilicates contributed to a better u
REM - International Engineering Journal. Publicado em: 2022
-
2. Thermostimulated crystal structure transformation of the polymineral clay submicron particles
Abstract Changes in the structure of phyllosilicate microparticles of submicron fractions of polymineral clay with an average size of 290 nm, as well as changes in the positions of impurity ions of transition metals in the crystal lattice, were studied by X-ray diffraction analysis, Fourier transform infrared spectroscopy, and high-resolution electron parama
Cerâmica. Publicado em: 2022
-
3. Potentiometric Titration and Out-Of-Equilibrium pH Response of the Biotite‑Water System
Minerals in soils contribute significantly to the capacity of soils to buffer pH disturbance. In this paper, we present the pH buffering capacity of a common soil phyllosilicate mineral, biotite. We performed equilibrium potentiometric titrations and we also monitored the pH response kinetics of the mineral-water system in order to develop an out-of-equilibr
J. Braz. Chem. Soc.. Publicado em: 2015-09
-
4. Sintese de silica e filossilicatos organofuncionalizados : estudos de adsorção e termoquimica de interação com cations metalicos / Synthesis of organofunctionalized silica and phyllosilicates : study of adsorption and thermochemistry of interaction with metallic cations
Dois novos agentes sililantes foram sintetizados através das reações individuais das moléculas etanolamina e dietanolamina com o precursor 3- glicidoxidopropiltrimetoxissilano. Estas interações foram possíveis pela abertura do anel epóxido, presente na extremidade da cadeia do precursor, com os centros básicos das aminas. As sínteses destes novos a
Publicado em: 2008
-
5. NanocompÃsito montmorilonita/polipirrol: preparaÃÃo,caracterizaÃÃo e aplicaÃÃo como sensores de volÃteis
Clay/polymer nanocomposites have been sufficiently studied during some time because they could be used in industrial applications. Clay is a Phyllosilicate Subclass Mineral, it is formed by sheets, layers or lamels and has a Tetrahedron- Octahedron-Tetrahedron (TOT) like structure with free hydroxile and cations between the lamels and on the surface. In this
Publicado em: 2006
-
6. Characterization of complex mineral assemblages: Implications for contaminant transport and environmental remediation
Surface reactive phases of soils and aquifers, comprised of phyllosilicate and metal oxohydroxide minerals along with humic substances, play a critical role in the regulation of contaminant fate and transport. Much of our knowledge concerning contaminant-mineral interactions at the molecular level, however, is derived from extensive experimentation on m
The National Academy of Sciences.