Results 11 to 20 of about 5,265 (264)
Mineralogy and crystal-chemistry of trioctahedral smectites from Turkey [PDF]
Clays and Clay MineralsAbstract This study focused on a detailed mineralogical and crystal-chemical analysis of Mg-smectites from four bentonite samples from Turkey. Mg-rich smectites, mainly associated with alkaline and evaporitic depositional conditions, are formed in environments such as salt lakes, brine springs, and sabkhas, as well as in hydrothermal systems, in ...
Adrián Lorenzo +3 more
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Adsorption of Water Insoluble Porphyrin to Trioctahedral Layered Aluminosilicate and Its Surface Acidity [PDF]
, 2020 This study investigated the adsorption of a non-ionic water-insoluble organic molecule (meso-tetraphenylporphyrin, TPP) on a trioctahedral layered aluminosilicate (saponite, SP) in organic solvents...
Miharu Eguchi
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Removal of heavy metals (Co, Cr, and Zn) during calcium–aluminium–silicate–hydrate and trioctahedral smectite formation [PDF]
Journal of Materials Science, 2019 Hydrated aluminosilicates were synthesized with and without aqueous heavy metals (Me), such as cobalt (Co), chromium (Cr), and zinc (Zn), by a sol–gel process at different initial molar ratios of Ca/(Si + Al) (0.6–1.6) and Me/Si (0.0–2.0), and constant ...
Andre Baldermann +6 more
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Crystal structure and chemistry of lithium-bearing trioctahedral micas-3T
European Journal of Mineralogy, 2003 Chemical analyses and crystal structure refinements were performed on lithian siderophyllite-3 T crystals from granitic pegmatites of the anorogenic Pikes Peak batholith (Colorado) to characterize the crystal chemistry and relations with trioctahedral lithium-bearing micas showing different stacking sequences.
Maria Franca Brigatti +2 more
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Applied Clay Science, 2019 Smectite hydration impacts dynamical properties of interlayer cations and thus the transfer and fate of H2O, contaminants, and nutriments in surficial environments where this ubiquitous clay mineral is often one of the main mineral components.
Doriana Vinci +6 more
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3T-trioctahedral-micas, coexisting-polytypes, cation-ordering [PDF]
Acta Crystallographica Section A Foundations of Crystallography, 2002 F. Scordari +3 more
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Mesoporous Materials Produced from Novel Trioctahedral Ni-Smectite
Journal of the Ceramic Society of Japan, 1992 Novel trioctahedral Ni-smectites were synthesized hydrothermally from Ni-Si hydrous oxide at 125°-300°C under autogeneous water vapour pressure for 2h. With increasing temperature of hydrothermal reaction, adsorption of methylene blue (MB) increased from 0.20meq⋅g-1 to 0.76meq⋅g-1 between 125° and 175°C, but gradually decreased from 0.76meq⋅g-1 to 0 ...
Kazuo Torii +3 more
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Structural iron in dioctahedral and trioctahedral smectites: a polarized XAS study [PDF]
Physics and Chemistry of Minerals, 2015 The chemical form of structural Fe in smectites influences many physicochemical properties of these clay minerals. Powder EXAFS data for structural Fe in smectites have been reported; however, the preferred orientation of clay platelets with respect to the X-ray beam may lead to erroneous conclusions on the local chemical environment.
N. Finck, M. Schlegel, A. Bauer
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Alteration of trioctahedral micas in the presence of inorganic and organic acids
Applied Clay Science, 2023 Chiara Cappelli +3 more
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A polarized XANES investigation of Mg-rich trioctahedral micas
AIP Conference Proceedings, 2003 In this work we analyse the polarized Mg and Fe K‐edge XANES spectra obtained on single crystals of phlogopite, (sample from Franklin, New Jersey), and of tetra‐ferriphlogopite (sample from Tapira, Alto Paranaiba, Brazil). These crystals show composition close to the end‐members, thus they present similar chemical composition in octahedral and ...
Francesca Tombolini
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