Results 41 to 50 of about 127 (124)

CHARACTERIZATION OF VERMICULITE BY XRD AND SPECTROSCOPIC TECHNIQUES

Earth Sciences Research Journal, 2009
A natural mineral from Santa Marta-Colombia used as the starting material in the synthesis of pillared clays has been characterized by several techniques, including X-ray diffraction, X-ray fluorescence, electronic paramagnetic resonance, aluminum ...
Molina R., Moreno S., Campos A.
doaj  

Alteration of trioctahedral micas in the presence of inorganic and organic acids

Applied Clay Science, 2023
CGL2017–82331 ...
Cappelli, Chiara, Van Driessche, Alexander Edgard Suzanne, Cama, Jordi, Huertas Puerta, Francisco Javier   +3 more
openaire   +3 more sources

Low temperatures and high water/rock ratios in asteroid (101955) Bennu's history based on X‐ray powder diffraction of returned samples

Meteoritics &Planetary Science, Volume 61, Issue 6, Page 1077-1094, June 2026.
Abstract Samples returned by NASA's OSIRIS‐REx mission from the carbonaceous asteroid (101955) Bennu hold clues about conditions in the early solar system and the formation of planetary bodies. Initial investigation of Bennu samples found that they are rich in phyllosilicates and other secondary minerals formed during aqueous alteration of a larger ...
A. J. King, P. F. Schofield, J. Najorka, H. C. Bates, S. S. Russell, T. J. McCoy, T. J. Zega, H. C. Connolly Jr, D. S. Lauretta   +8 more
wiley   +1 more source

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.
BRIGATTI, Maria Franca, DE Kile, POPPI, Luciano   +2 more
openaire   +1 more source

Negative Frictional Healing in Icelandic Geothermal (IDDP‐2) Core Samples: Potential Implications for Detachment‐Fault Mechanics

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 4, April 2026.
Abstract Detachment faults in mid‐ocean ridge settings accommodate tectonic extension. These faults are potentially weakened by alteration through phyllosilicate‐ and amphibole‐mineral formation. Seven core samples taken from the Krafla and Reykjanes geothermal fields in Iceland allow for the study of the effect of mineral alteration on the frictional ...
Barnaby Fryer, Florian Jermann, Patricia Patrier, Bruno Lanson, Stanislav Jelavic, Simon Guérin‐Marthe, Gabriel Meyer, Fabrice Barou, Marie Violay   +8 more
wiley   +1 more source

Depositional Facies, Sequence Stratigraphy, and Diagenesis of Lower Cretaceous Carbonate Reservoir, Southern Iraq: Implications for Petroleum Exploration

Journal of Petroleum Geology, Volume 49, Issue 2, Page 312-345, April 2026.
ABSTRACT The Lower Cretaceous Yamama Formation of southern Iraq represents a key carbonate reservoir within Iraq and the Middle East, yet its complex depositional facies architecture and diagenetic alterations present challenges for predicting reservoir quality.
A. K. A. Mohammed, F. Velledits, I. Q. Mohammed, M. Alsuwaidi, H. Mansurbeg, F. Kristály, D. K. Ivanova, Eloi González‐Esvertit, A. Awdal   +8 more
wiley   +1 more source

Mineral Chemistry of Chlorite Replacing Biotite from Granitic Rocks of the Canadian Appalachians [PDF]

Journal of Sciences, Islamic Republic of Iran, 2009
Chlorite flakes, as a product of alteration of biotite, the dominant ferromagnesian mineral in the Paleozoic granitic rocks of the Canadian Appalachians, have been analyzed by electron microprobe for major elements and by 57Fe M?ssbauer spectroscopy for ...
A.A. Tabbakh Shabani
doaj  

Impact of Organic and Inorganic Fillers on the Performance of Ternary Biodegradable Poly(Butylene Succinate‐Co‐Butylene Adipate), Poly(Butylene Adipate‐Co‐Terephthalate), and Poly(3‐Hydroxybutyrate‐Co‐3‐Hydroxyvalerate) Blends

Polymer Composites, Volume 47, Issue 5, Page 4509-4526, 10 March 2026.
Development of a ternary blend composite based on PBAT/PBSA/PHVB with improved mechanical properties. ABSTRACT This study explores a ternary biodegradable blend of bio‐based poly(butylene succinate‐co‐adipate) (bio‐PBSA), poly(butylene adipate terephthalate) (PBAT), and poly(3‐hydroxybutyrate‐co‐3‐hydroxyvalerate) (PHBV).
Sasha Paquette, Matias Menossi, Ehsan Pesaranhajiabbas, Hamdy Khalil, Manjusri Misra, Amar Kumar Mohanty   +5 more
wiley   +1 more source

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

Broadband Dielectric Analysis of Clays: Impact of Cation Exchange Capacity, Water Content, and Porosity

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 3, March 2026.
Abstract Clay‐rich soils and sediments are key components of near‐surface systems, influencing water retention, ion exchange, and structural stability. Their complex dielectric response under moist conditions arises from surface–ion electrostatics and diffuse double layers that govern transport and retention processes. This study explores the broadband
Felix Schmidt, Norman Wagner, Ines Mulder, Katja Emmerich, Thierry Bore, Jan Bumberger   +5 more
wiley   +1 more source