Results 21 to 30 of about 4,204 (206)

Characterization of Unye bentonite after treatment with sulfuric acid

Química Nova, 2013
Unye bentonite was found to consist predominantly of a dioctahedral smectite along with quartz, tridymite, cristobalite, and minor fractions of feldspar and anatase.
Bulent Caglar, Beytullah Afsin, Engin Koksal, Ahmet Tabak, Erdal Eren   +4 more
doaj   +1 more source

Archaeometric Analyses of Medieval Pottery from the Lower Danube Region, Romania. [PDF]

Chempluschem
This study is about the pottery manufacturing in the Lower Danube region during the Early Medieval period (8th–10th c. AD). Optical microscopy, Particle induced X‐ray emission, and X‐ray diffraction analyses performed on 32 representative ceramic shards excavated at Pantelimonu de Sus, Constanţa County, Romania, provide clues on the raw materials and ...
Haită C, Talmaţchi C, Banici AM, Bugoi R.   +3 more
europepmc   +2 more sources

Preparation of Al/Fe-Pillared Clays: Effect of the Starting Mineral [PDF]

, 2017
Four natural clays were modified with mixed polyoxocations of Al/Fe for evaluating the effect of the physicochemical properties of the starting materials (chemical composition, abundance of expandable clay phases, cationic exchange capacity and textural ...
Antonio Gil, Carolina Blanco, Helir-Joseph Muñoz, Luis-Alejandro Galeano, Miguel-Ángel Vicente   +4 more
core   +3 more sources

How the Solid/Liquid Ratio Affects the Cation Exchange Process and Porosity in the Case of Dioctahedral Smectite: Structural Analysis?

Adsorption Science & Technology, 2021
The performance of a clay mineral geomembrane used in the context of a geological barrier for industrial and radioactive waste confinement must pass through the understanding of its hydrous response as well as the limits of the cation exchange process ...
Chadha Mejri, Walid Oueslati, Abdesslem Ben Haj Amara   +2 more
doaj   +1 more source

Acidity of edge surface sites of montmorillonite and kaolinite [PDF]

, 2013
Peer ...
Cheng, Jun, Liu, Xiandong, Lu, Xiancai, Meijer, Evert Jan, Sprik, Michiel, Wang, Rucheng   +5 more
core   +1 more source

CHARACTERIZATION OF CLAYS USED FOR MEDICINAL PURPOSES IN THEARCHIPELAGO OF CAPE VERDE [PDF]

Geochimica Brasiliensis, 2012
Samples taken from pieces of two clays being commercialized for medicinal purposes(alleviation of gastrointestinal problems, treatment of abscesses, furuncles and wounds, aswell as of skin ailments, and cosmetic applications) by ...
C. S. F. Gomes, R. Hernandez, M. C. Sequeira, J. B. P. Silva   +3 more
doaj  

BEHAVIOR OF MINERALS IN AGRO SODDY PODZOLIC SOILS RESULTED FROM DIFFERENT RATES OF ORGANIC FERTILIZERS

Бюллетень Почвенного института им. В.В. Докучаева, 2014
The experimental results showed the impact rendered by different rates of organic fertilizers in the kind of poultry excrements on crystallochemical parameters of minerals containing in the fine-dispersed fractions (less than 1, 1-5, 5-10 mkm).
N. P. Chizhikova, E. B. Varlamov, V. I. Savich   +2 more
doaj   +1 more source

Evolution and significance of clay minerals in the Esna Shale Formation at Dababiya area, Luxor, Egypt

Egyptian Journal of Petroleum, 2021
The Esna Shale Formation is broadly distributed in Egypt and one of the most of its important clay deposits. These deposits in the Dababiya area, Luxor region were subjected to intensive laboratory investigations (XRD, IR, and SEM analyses). The bulk and
A. El-Shater, A.M. Mansour, M.R. Osman, Ahmed A. Abd El Ghany, A. Abd El-Samee   +4 more
doaj   +1 more source

Comprehensive physicochemical study of dioctahedral palygorskite-rich clay from Marrakech High Atlas (Morocco) [PDF]

, 2013
This study is devoted to the physicochemical and mineralogical characterizations of palygorskite from Marrakech High Atlas, Morocco. The raw clay and its Na?-saturated\ 2 lm fraction were characterized using chemical, structural, and thermal analytical ...
Amjoud, M'barek, Aït Aghzzaf, Ahmed, Bouna, Lahcen, Daoudi, Lahcen, Jada, Amane, Lafont, Marie-Christine, Lakbita, Omar, Maury, Francis, Rhouta, Benaïssa, Senocq, François, Zatile, Ezzouhra   +10 more
core   +4 more sources

Thermal rearrangements for dioctahedral smectite.

Journal of the Mineralogical Society of Japan, 1990
Structural rearrangements for dioctahedral smectite after thermal treatment were investigated. The notable structural changes accompanying removal of interlayer water are contraction of basal spacing, migration of interlayer cation into silicate layer and expansion of b-parameter.
Motoharu KAWANO, Katsutoshi TOMITA
openaire   +2 more sources