Results 41 to 50 of about 26,121 (210)
Mimetite precipitation on Pb-clinoptilolite: an effective approach for arsenate removal from water
MineralogiaThis 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 +2 more
doaj +1 more source
Metadolomitos talcificados do Grupo Itaiacoca, Paraná: regime de fluidos e implicações genéticas
Geologia USP. Série Científica, 2011 As maiores reservas de talco no Brasil estão localizadas em metadolomitos proterozoicos de baixo grau do Grupo Itaiacoca. Foram analisadas inclusões fluidas em três contextos diferentes de formação de talco.
Danilo Marques Saunite +3 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 +5 more
wiley +1 more source
MineralogiaChert, 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
Geologia e Geocronologia do Maciço Alcalino Máfico-Ultramáfico Ponte Nova (SP-MG)
Geologia USP. Série Científica, 2009 O maciço alcalino máfico-ultramáfico Ponte Nova, localizado no setor norte da Província Serra do Mar, junto à porção oriental da Serra da Mantiqueira, na região Sudeste do Brasil, encontra-se encaixado em granitoides e gnaisses migmatíticos Pré ...
Rogério Guitarrari Azzone +3 more
doaj +1 more source
Mineralogia: Disciplina Básica e Profissionalizante
Geologia USP. Publicação Especial, 2007 This article discusses the importance of Mineralogy for the graduate Geology degree course at the University of SA£o Paulo. The discussion started due to possible changes that may occur in the fields of occupation of geologists in the professional market, as new regulations have been proposed by the regulatory councils (Confea, Conselho Federal de ...
Fábio Ramos Dias de Andrade +1 more
openaire +2 more sources
, 2011 A fase sólida dos solos é composta de uma fracção mineral e uma orgânica. Por sua vez, a fracção mineral divide-se em lotes de dimensões que apresentam diferenças em relação à mineralogia e ao comportamento químico.
Sampaio, Elsa
core
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 +4 more
wiley +1 more source
Contribució a l'estudi de la mineralogia catalana [PDF]
Butlletí de la Institució Catalana d'Història Natural, 1931 Closas i Miralles, Josep
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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 +10 more
wiley +1 more source