Results 31 to 40 of about 7,690 (220)

A phlogopite-amphibole-plagioclase bearing websterite from Guinadji volcano (Adamawa Plateau, Northern Cameroon): evidence of a cumulate origin and crustal event

Mineralogia
An unusual phlogopite-amphibole-plagioclase-bearing websterite xenolith has been sampled in an alkali basaltic pyrolastite from Guinadji volcano, SE Ngaoundéré, Adamawa plateau, northern Cameroon, eastern extension of the continental sector of the ...
Kagarabi Paterne Mulimbi, Ntaflos Theodoros, Tamen Jules, Nkouathio David G., Tumba Kaniki   +4 more
doaj   +1 more source

Co‐Impregnated MgAl Layered Double Hydroxide as an Efficient Catalyst for Glycerol Oligomerization

Applied Organometallic Chemistry, Volume 40, Issue 1, January 2026.
A cobalt(II) acetylacetonate–impregnated MgAl LDH catalyst was developed, showing enhanced basicity and superior activity in glycerol oligomerization, achieving 68% conversion and 27% diglycerol selectivity. The catalyst maintained high performance over three recycling cycles, with structural and surface modifications confirmed by comprehensive ...
Fernando José Soares Barros, Ramón Moreno‐Tost, Juan A. Cecilia, Francisco Murilo Tavares de Luna, Enrique Rodríguez‐Castellón, Rodrigo Silveira Vieira   +5 more
wiley   +1 more source

Mimetite and polymineralic mimetite-pyromorphite-vanadinite single crystals from the Sowie Mts, Poland

Mineralogia
Millimeter-sized crystals of mimetite and pyromorphite, and polymineralic mimetite-pyromorphite-vanadinite crystals occur in quartz-baryte vein within paragneisses of the Sowie Mts, SW Poland.
Szełęg Eligiusz, Janeczek Janusz, Juroszek Rafał, Danila Marta   +3 more
doaj   +1 more source

Clays for Low‐Carbon Cements: Overview, Progress, and Challenges

Global Challenges, Volume 10, Issue 1, January 2026.
This review provides a critical overview of recent developments of activated clays to function as artificial pozzolans. After a thorough description of the clays that yield good pozzolanic performances, selected examples are given on thermal and mechanical activations. Chiefly, general correlations are extracted from reported data despite its scattered
Imane Koufany, Isabel Santacruz, Angeles G. De la Torre, María D. Rodríguez‐Ruiz, Miguel A. G. Aranda   +4 more
wiley   +1 more source

Syn-volcanic melt-rock reactions recorded in peridotitic xenoliths from Scania, S Sweden

Mineralogia
Peridotite xenoliths from Scania (S Sweden), brought to the surface by Mesozoic basanitic magmas, provide insights into the lithospheric mantle underlying the East European Craton.
Kukuła Anna, Matusiak-Małek Magdalena, Mikrut Jakub, Ntaflos Theodoros, Johansson Leif   +4 more
doaj   +1 more source

Templated Tube Growth About a Reactive Gas Plume: The Pharaoh's Serpent Reaction, Thermodecomposition of Mercury Thiocyanate in Air

ChemSystemsChem, Volume 8, Issue 1, January 2026.
XX XX ABSTRACT The pharaoh's serpent reaction, the thermodecomposition of mercury thiocyanate in air, is a classic chemical demonstration. We analyse and characterize the reaction products, composed of two different phases, graphitic carbon nitride, C3${\rm C} _3$N4${\rm N} _4$, and metacinnabar, HgS.
Carlos Pimentel, Sergio Testón‐Martínez, Carlos Gutierrez‐Ariza, C. Ignacio Sainz‐Díaz, Julyan H. E. Cartwright   +4 more
wiley   +1 more source

Instrumentació Històrica de Cristal·lografia i Mineralogia

, 2022
Objectius: Presentar la col·lecció d’instruments històrics que s'exhibeixen al CRAI Biblioteca de Ciències de la Terra, que formaven part de la col·lecció de les antigues Facultat de Ciències i Càtedra de Cristal·lografia i Mineralogia i del més recent ...
Universitat de Barcelona. CRAI
core  

Mimetite precipitation on Pb-clinoptilolite: an effective approach for arsenate removal from water

Mineralogia
This short communication proposes a novel approach to arsenate remediation using in situ precipitation of mimetite [Pb5(AsO4)3Cl], a sparingly soluble mineral phase with an apatite structure.
Stępień Ewa, Manecki Maciej, Bajda Tomasz   +2 more
doaj   +1 more source

Chemical and isotopic characterization of nitrate retained and leached from soil after manure fertilization-by lysimeter experiments [PDF]

E3S Web of Conferences, 2019
Increase of soil fertilization produces an increase of N exported to the hydrosphere. The amount of nitrate that reaches the aquifers is controlled by processes affecting N-species within the soils.
Otero Neus, Llovet Alba, Carrey Raúl, Ribas Angela, Domene Xavier, Mattana Stefania, Chin-Pampillo Juan, Alcañiz Josep Mᵃ, Soler Albert   +8 more
doaj   +1 more source

Palagonitization of Volcanic Rocks in Polar Climates: The Case of Deception Island (Antarctica)

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 12, December 2025.
Abstract A detailed study of palagonitization in rocks from Deception Island—one of Antarctica's most active volcanoes—has been performed to advance our understanding of this alteration process. A detailed petrographic (optical and SEM), mineralogical (XRD), and mineral and glass spot geochemistry (EDS and EMP) characterization has been conducted on ...
Oriol Vilanova‐Pagès, Guillem Gisbert, Helena Albert, Adelina Geyer, Meritxell Aulinas, Raquel Arasanz, Jordi Ibañez‐Insa, Antonio Polo‐Sánchez, Antonio Álvarez‐Valero, Olga Prieto‐Ballesteros, Santiago Giralt   +10 more
wiley   +1 more source