Results 51 to 60 of about 9,694 (251)

Phyllosilicate Infrared Spectral Features as Tracers of Aqueous Alteration in CM Chondrites and Implications for Remote Sensing of Hydrated Asteroids

Journal of Geophysical Research: Planets, Volume 130, Issue 12, December 2025.
Abstract CM (Mighei‐type) carbonaceous chondrites host abundant OH/H2O‐bearing phyllosilicates formed from water‐rock reactions in primitive planetesimals. Their infrared (IR) spectral features resemble those of C‐type asteroids, making laboratory analyses of CMs essential for interpreting asteroid observations.
W. M. Lawrence, B. L. Ehlmann
wiley   +1 more source

Electrical Conductivity During Controlled Deformation at Upper‐Mantle Conditions: First Experimental Achievements in a Griggs‐Type Apparatus

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 11, November 2025.
Abstract Electrical conductivity measurements on well‐characterized materials in the laboratory allow accurate interpretations of high‐conductivity anomalies within the lithosphere and asthenosphere, both affected by substantial deformation over geological times.
Thomas P. Ferrand, Jacques Précigout, David Sifré, Johannes C. Vrijmoed, Timm John, Frédéric Savoie, Rémi Champallier, Fabrice Gaillard   +7 more
wiley   +1 more source

Chemical, thermal and infra-red characterization of chrysotile modes from the Wadi Daftah serpentinite (Semail ophiolite), United Arab Emirates

Discover Geoscience
Serpentine minerals, either polymorphs or polytypes (mostly chrysotile, lizardite and antigorite), are hardly distinguished in ophiolitic serpentinites and serpentinized peridotite unless sophisticated mineralogical tools are applied.
Mohamed Th. S. Heikal, Adel A. Surour, Abdelaziz A. Said   +2 more
doaj   +1 more source

Petrography of phosphates in CI and CY carbonaceous chondrites

Meteoritics &Planetary Science, Volume 60, Issue 11, Page 2594-2622, November 2025.
Abstract Phosphate minerals are significant carriers of volatiles (e.g., OH) and halogens in chondritic material; however, their origin in most groups of carbonaceous chondrites remains poorly characterized. We have determined the abundance, morphology, texture, and composition of phosphate grains in aqueously altered CI chondrites and in hydrated and ...
C. S. Harrison, A. J. King, R. H. Jones, L. Piani   +3 more
wiley   +1 more source

Near-Infrared Spectroscopy Study of Serpentine Minerals and Assignment of the OH Group

Crystals, 2021
Three different kinds of serpentine mineral samples were investigated using Fourier transform near-infrared spectroscopy (FTNIR). The results show that there are obvious differences in the characteristic infrared spectra of the three serpentine group ...
Shaokun Wu, Mingyue He, Mei Yang, Biyao Zhang, Feng Wang, Qianzhi Li   +5 more
doaj   +1 more source

Potential Slow Release Fertilizers and Acid Soil Conditioners Obtained by One-Pot Mechanochemical Activation of Chrysotile:Cement Roofing Sheets with K2HPO4

, 2018
Chrysotile:cement roofing sheets were milled with and without K2HPO4. As indicated by X-ray diffraction (XRD), the samples crystallinities were reduced with the increasing milling time. The same tendency was observed by scanning electron microscopy (SEM)
R. Borges, F. Wypych
semanticscholar   +1 more source

Adverse health effects of asbestos: solving mysteries regarding asbestos carcinogenicity based on follow-up survey of a Chinese factory

Environmental Health and Preventive Medicine, 2018
The present review summarizes the results of several follow-up studies assessing an asbestos product manufacturing plant in Chongqing, China, and discusses three controversial issues related to the carcinogenicity of asbestos.
Eiji Yano
doaj   +1 more source

Quantifying Serpentinization‐Driven Remagnetization From Ridge Axis to Subduction Zone Using Quantum Diamond Microscopy

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 10, October 2025.
Abstract Diachronous ferromagnetic (sensu lato) mineral populations are often juxtaposed on micrometer‐to‐millimeter scales. This poses significant challenges for extracting reliable paleomagnetic information because standard methods measure bulk magnetic moments and cannot distinguish between magnetic minerals with overlapping demagnetization spectra.
Liang Qi, Adrian R. Muxworthy, Evelyn B. Baker, Xiaobin Cao, Simon Allerton, James F. J. Bryson, Yong Zhang   +6 more
wiley   +1 more source

Evaluation of Deposition and Clearance of Asbestos (Detected by SEM-EDS) in Lungs of Deceased Subjects Environmentally and/or Occupationally Exposed in Broni (Pavia, Northern Italy)

Frontiers in Public Health, 2021
Biodurability is one of the main determinants of asbestos hazardousness for human health. Very little is known about the actual persistence of asbestos in lungs and its clearance, nor about differences in this regard between the different mineralogical ...
Silvia D. Visonà, Silvana Capella, Silvana Capella, Sofia Bodini, Paola Borrelli, Paola Borrelli, Simona Villani, Eleonora Crespi, Claudio Colosio, Claudio Colosio, Carlo Previderè, Elena Belluso, Elena Belluso   +12 more
doaj   +1 more source

The Haber Bosch Catalyst from Solid state Chemistry to Mesotechnology

Advanced Energy Materials, Volume 15, Issue 33, September 2, 2025.
A comprehensive, multi‐scale, multi‐modal study of the structural diversity of a technical multi‐promoted Haber Bosch catalyst for ammonia synthesis is provided. The different contributions of ammonia Fe are revealed and the presence of cement phases that have yet not been incorporated into discussions on the function of this catalyst system is shown ...
Kassiogé Dembélé, Jihao Wang, Maxime Boniface, Jan Folke, Luis Sandoval Diaz, Frank Girgsdies, Adnan Hammud, David Kordus, Gregor Koch, Zahra Gheisari, Raoul Blume, Wulyu Jiang, Axel Knop‐Gericke, Rene Eckert, Stephan Reitmeier, Andreas Reitzmann, Robert Schlögl, Beatriz Roldan Cuenya, Janis Timoshenko, Holger Ruland, Thomas Lunkenbein   +20 more
wiley   +1 more source