Results 51 to 60 of about 5,265 (264)

The effect of sonication on dioctahedral and trioctahedral micas

Ultrasonics Sonochemistry, 2006
This paper reports on the effect of sonication on two mica samples. The materials have been investigated in terms of structure modifications, particle size and morphology, specific surface area and thermogravimetric behaviour. The effect of the mica structure, namely density and distribution of cations over the octahedral sites, on the sonicated ...
J L, Pérez-Rodríguez, A, Wiewióra, J, Drapala, L A, Pérez-Maqueda   +3 more
openaire   +2 more sources

Structural, Mineral and Elemental Composition Features of Iron-Rich Saponite Clay from Tashkiv Deposit (Ukraine)

Colloids and Interfaces, 2019
Low-temperature nitrogen adsorption–desorption isotherms, scanning electron microscopy, transmission electron microscopy, X-ray diffraction, as well as infrared spectroscopy were used to characterize structural features of raw and acid-treated ...
Halyna Sokol, Myroslav Sprynskyy, Alla Ganzyuk, Victoria Raks, Bogusław Buszewski   +4 more
doaj   +1 more source

Determination of physicochemical conditions and role of fluids in evolution of Geysour granitoid (eastern Gonabad), using biotite mineral chemistry

Journal of Economic Geology, 2021
Introduction The chemical composition of biotite in mineralization associated with granitoids and copper porphyry deposits is sensitive to several chemical and physical factors.
Ahmad Ahmadi Khalaji , Abdolsamad Pourmohammad , Mohammad Ebrahimi , Masoud Homam, Rasoul Esmaeili   +4 more
doaj   +1 more source

Zinc-rich clays in supergene non-sulfide zinc deposits [PDF]

, 2015
International audienceThe nature and the origin of zinc clays are poorly understood. With the example of the Bou Arhous Zn-Pb ore deposit in the Moroccan High Atlas, this study presents new data for the mineralogical and chemical characterization of ...
Barbanson, Luc, Buatier, M., Choulet, Flavien, Ennaciri, A., Guégan, Régis   +4 more
core   +2 more sources

Crystal Chemistry and Surface Configurations of Two Iron-Bearing Trioctahedral Mica-1M Polytypes

Clays and clay minerals, 2014
Chiara Elmi, Maria Franca Brigatti, Stephen Guggenheim, Luca Pasquali, Monica Montecchi, S. Nannarone   +5 more
openalex   +3 more sources

Synthesis, characterization and photocatalytic activity of TiO2 supported natural palygorskite microfibers [PDF]

, 2011
This study deals with the synthesis of TiO2 supported Moroccan palygorskite fibers and their use as photocatalyst for the removal of Orange G pollutant from wastewater.
Amjoud, M'barek, Bouna, Lahcen, Daoudi, Lahcen, Jada, Amane, Lafont, Marie-Christine, Maury, Francis, Rhouta, Benaïssa, Senocq, François   +7 more
core   +2 more sources

Diagenetic smectite-to-illite transition in clay-rich sediments: A reappraisal of X-ray diffraction results using the multi-specimen method [PDF]

, 2009
International audienceSmectite illitization is a common mineralogical reaction occurring during the burial diagenesis of clay-rich sediments and shales, and has thus attracted sustained interest over the last fifty years.
Claret, Francis, Drits, Victor A., Lanson, Bruno, Sakharov, Boris A.   +3 more
core   +3 more sources

Origin of clay minerals in Early Eocene volcanic paleosols on King George Island, Maritime Antarctica

Scientific Reports, 2017
The paleoclimate during the Early Eocene in Maritime Antarctica is characterized by cool conditions without a pronounced dry season. Soils formed on volcanic material under such climate conditions in modern analogue environments are usually Andosols rich
Diogo Noses Spinola, Teresa Pi-Puig, Elizabeth Solleiro-Rebolledo, Markus Egli, Masafumi Sudo, Sergey Sedov, Peter Kühn   +6 more
doaj   +1 more source

Identification of Heavy Metals in Crystals of Sand and Silt Fractions of Soils by Scanning Electron Microscopy (SEM EDS/WD-EPMA)

Revista Brasileira de Ciência do Solo, 2018
Studies of heavy metals are concentrate on clay fractions, but coarser fractions of the soil can constitute significant sources of structural forms of heavy metals.
Araína Hulmnn Batista, Vander Freitas Melo, Robert Gilkes, Malcolm Roberts   +3 more
doaj   +1 more source

Influence of OH- concentration on the illitization of kaolinite at high pressure [PDF]

, 2011
The products of hydrothermal reactions of kaolinite at 300°C and 1000 bars were studied in KOH solutions covering an OH- concentration, [OH-], of 1M to 3.5M. XRD patterns indicated a notable influence of the [OH-] on the reaction.
Becerro Nieto, Ana Isabel, Escudero, A., Mantovani, Marco   +2 more
core   +1 more source