Results 81 to 90 of about 5,265 (264)

Evolução geoquímica e mineralógica em perfis de alteração sobre rochas serpentinizadas no sudoeste de Minas Gerais Geochemical and mineralogical evolution in alteration profiles on serpentinized rocks in southwestern Minas Gerais, Brazil

Revista Brasileira de Ciência do Solo, 2007
Estudou-se a evolução geoquímica e mineralógica em três perfis distintos de alteração de rochas serpentinizadas que ocorrem nas imediações dos municípios de Alpinópolis e Fortaleza de Minas, no sudoeste do Estado de Minas Gerais, sob regimes de umidade e
Pablo Vidal-Torrado, Rosa Calvo, Felipe Macias, Sebastião G. Carvalho, Alexandre Christofaro Silva   +4 more
doaj   +1 more source

Removal of basic yellow cationic dye by an aqueous dispersion of Moroccan stevensite [PDF]

, 2013
The aim of this study was to investigate the adsorption of basic yellow, a cationic dye, from aqueous solution by natural stevensite, with 104m2/g of specific surface area. The kinetics and the effects of several experimental parameters such as the pH of
Ajbary, Mohamed, Esquivias Fedriani, Luis María, Morales Flórez, Víctor, Santos, Alberto   +3 more
core   +1 more source

Soil K‐bearing minerals respond differently to various potassium extraction methods targeting phytoavailability

Soil Science Society of America Journal, Volume 89, Issue 6, November/December 2025.
Abstract Non‐exchangeable potassium (Nex‐K) released slowly from minerals is a key component of long‐term K fertility of agricultural soils. Two extraction methods are widely used to determine soil Nex‐K: the boiling nitric acid (HNO3) method and the tetraphenylborate (TPB) method.
Kohei Kurokawa, Atsushi Nakao, Atsuhito Suzuki, Shokichi Wakabayashi, Shigeto Fujimura, Tetsuya Eguchi, Takuro Shinano, Junta Yanai   +7 more
wiley   +1 more source

High-pressure behaviour and elastic constants of 1M and 2M₁ polytypes of phlogopite KMg₃Si₃AlO₁₀(OH)₂ [PDF]

Solid Earth
In the present work, the elastic properties of both 1M and 2M1 phlogopite polytypes, KMg3Si3AlO10(OH)2 (monoclinic crystal system) were investigated from PV equation of state fitting and by analysis of the fourth-rank elastic tensor.
G. Ulian, F. Ranellucci, G. Valdrè
doaj   +1 more source

Structure of the {001} talc surface as seen by atomic force microscopy: Comparison with X-ray and electron diffraction results [PDF]

, 2006
In this study the surface structure of a centimetre sized crystal of talc from the Trimouns deposit (Ariège, France) was imaged by atomic force microscopy. The direct image shows detailed characteristics of clay tetrahedral surfaces.
Boudet, Alain, De Parseval, Philippe, Ferrage, Eric, Ferret, Jocelyne, Gaillot, Anne-Claire, Lanson, Bruno, Marti, Francois, Petit, Sabine, Seine, Grégory   +8 more
core   +4 more sources

Clay‐Mineral‐Coated Separators for Lithium‐Ion Batteries: Exploring the Relationships between Clay Mineral Morphology and Separator Performance

Advanced Science, Volume 12, Issue 40, October 27, 2025.
This review examines how coating Li‐ion battery separators with 1D, 2D, and 3D structured natural clay minerals influences their electrochemical and mechanical performance. It classifies 15 types of clay minerals and highlights structure–property correlations to offer practical design strategies for high‐performance separators in next‐generation energy
Inseo Ko, Seoyoung Ha, Weon Ho Shin, Jongyoung Choi, Sung Cik Mun, Yong‐Seok Choi, Jong Ho Won   +6 more
wiley   +1 more source

Petrography and mineral chemistry of the Eocene granodiorites in the Toveireh area (Southwest of Jandaq, Isfahan province)

Journal of Economic Geology, 2019
Introduction Granitoids are the most common igneous rocks that are found in all parts of the continental crust and play an important role in the formation and evolution of the Earth’s continental crust (Clarke, 1992).
Masumeh Sargazi, Ghodrat Torabi
doaj   +1 more source

Nanostructured Clays Used as Carriers for Controlled Delivery of Antibacterial Compounds From Direct Restorative Dental Materials: A Scoping Review

Clinical and Experimental Dental Research, Volume 11, Issue 5, October 2025.
ABSTRACT Objective Through a scoping review, this study meticulously mapped and characterized these nanostructured clays used to release antibacterial active compounds from direct restorative dental materials. Material and Methods The systematic approach involved searches in the PubMed/MEDLINE, Lilacs, Web of Science, Scopus, ScienceDirect, and Embase ...
Bárbara Faria Sa de Barbosa, José Leôncio Ferreira Neto, Francisca Jennifer Duarte de Oliveira, Juliana Sales Osterno Leitão, Moan Jéfter Fernandes Costa, Pedro Henrique Sette‐de‐Souza, Pierre Basílio Almeida Fechine, Victor Pinheiro Feitosa, Boniek Castillo Dutra Borges   +8 more
wiley   +1 more source

Preliminary Spectroscopic Observations of Marble-Hosted Rubies, Marginal Host Marbles, and Transition Zones Between Marbles and Rubies on Samples from Afghanistan, Myanmar, and Pakistan

Crystals
This study focusses on the spectroscopic observation of marbles, rubies and the transition zone between ruby and its hosted marble that may distinguish the origin of ruby.
Chen Fan, Yung-Chin Ding, Wing-Tak Lui
doaj   +1 more source

Gênese de solos derivados de rochas ultramáficas serpentinizadas no sudoeste de Minas Gerais Genesis of soils formed from ultramafic serpentinized rocks in southwestern Minas Gerais (Brazil)

Revista Brasileira de Ciência do Solo, 2006
Os solos derivados de rochas serpentinizadas ou serpentinitos constituem um grupo especial de solos em toda superfície terrestre. De caráter ultramáfico, ou seja, rochas com mais de 70 % de minerais máficos (ferromagnesianos), os serpentinitos apresentam
Pablo Vidal-Torrado, Felipe Macias, Rosa Calvo, Sebastião Gomes de Carvalho, Alexandre Christófaro Silva   +4 more
doaj   +1 more source