Results 51 to 60 of about 26,318 (233)

Crystallography and mineralogy of the clay fraction of hardsetting horizons in soils of coastal tablelands in Brazil [PDF]

, 2009
A coesão de horizontes de solos do Brasil vem sendo associada, principalmente, a fatores físicos e químicos inter-relacionados, mas a influência das propriedades mineralógicas e cristalográficas dos minerais da fração argila também foi aventada por ...
BRINATTI, André Maurício, GIAROLA, Neyde Fabíola Balarezo, LIMA, Herdjania Veras de, ROMERO, Ricardo Espíndola, SILVA, Alvaro Pires da   +4 more
core   +3 more sources

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

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

Grundmannite, CuBiSe2, the Se-analogue of emplectite, a new mineral from the El Dragón mine, Potosí, Bolivia [PDF]

, 2016
© 2016 E. Schweizerbart'sche Verlagsbuchhandlung Science Publishers. Also published by Deutsche Mineralogische Gesellschaft, Sociedad Española de Mineralogía, Società Italiana di Mineralogia e Petrologia, Société Française de Minéralogie et de ...
Bindi, L, Förster, Hans-Jürgen, Stanley, Christopher   +2 more
core   +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

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

Archaeometric approach for the study of mortars from the underwater archaeological site of Baia (Naples) Italy: Preliminary results [PDF]

, 2015
This work was aimed to evaluate the features of mortar samples taken from the underwater archaeological area of Baia (Naples, Italy), an important site, where the remains of the ancient Roman city of Baiae and Portus Iulius are submerged after ...
Barca, D., Comite, V., Crisci, G. M., La Russa, Mauro Francesco, Ricca, M., Rovella, Natalia, Ruffolo, S. A., Álvarez de Buergo, Mónica   +7 more
core   +1 more source

Gipsgärten: Selbstorganisierte röhrenförmige Strukturen aus Calciumsulfat mit Relevanz für die Suche nach außerirdischem Leben

Angewandte Chemie, Volume 137, Issue 48, November 24, 2025.
Chemische Gärten sind selbstorganisierte abiotische Strukturen mit „lebensähnlichen” Formen. Hier zeigen wir, dass solche Prozesse auch nach Zugabe konzentrierter Sulfatlösungen zu festen Calciumsalzen ablaufen und sogenannte Gipsgärten ergeben. Die dafür nötigen Bedingungen sind weitgehend kompatibel mit den geochemischen Verhältnissen auf dem frühen ...
Selina Reigl, Elisabeth Wagner, Carlos Pimentel, Werner Kunz, Alexander E. S. Van Driessche, Matthias Kellermeier   +5 more
wiley   +1 more source

Mineralogical and whole-rock geochemical characterization of cherts from Gebel EL-Khashab (Oligocene), East Cairo, Egypt: evidence for silica sources

Mineralogia
Chert, a primarily silica-bearing sedimentary rock, is often found in limited layers within the Earth's lithosphere. Optical microscopy, X-ray diffraction, major and trace element analyses were used to study chert samples from Gebel El-Khashab—an ...
Hassan Kamaleldin M.
doaj   +1 more source