A5053797267- Clay minerals and soil interactions
- Geological and Geophysical Studies Worldwide
- Geological and Geochemical Analysis
- Iron oxide chemistry and applications
- Geochemistry and Geologic Mapping
- Soil and Unsaturated Flow
- Archaeological and Historical Studies
- Geological and Tectonic Studies in Latin America
- Archaeological and Geological Studies
- Crystal Structures and Properties
- Mineralogy and Gemology Studies
- Building materials and conservation
- Therapeutic Uses of Natural Elements
- Concrete and Cement Materials Research
- Lepidoptera: Biology and Taxonomy
- Medieval Architecture and Archaeology
- Chemical Synthesis and Characterization
- Species Distribution and Climate Change
- Cultural Heritage Materials Analysis
- Mineral Processing and Grinding
- Geomagnetism and Paleomagnetism Studies
- Radioactive element chemistry and processing
- Water Resource Management and Quality
- Soil Geostatistics and Mapping
- Plant and animal studies
Tecnológico de Monterrey
2025
Universidad de Salamanca
2015-2024
Nanomaterials and Nanotechnology Research Center
2023
Central University of Ecuador
2022
University of San Carlos of Guatemala
2009-2022
Francisco de Paula Santander University
2020
Fundación Instituto Valenciano de Oncología
2016
Universidad Complutense de Madrid
2009-2012
Hospital Del Mar
2011
Centro de Estudos da Voz
2008
Maya blue is an organo-clay artificial pigment composed of indigo and palygorskite. It was invented frequently used in Mesoamerica ancient times (eighth to 16th centuries). We analyse this paper one the characteristics that has attracted attention scientists since its rediscovery 1931: high stability against chemical aggression (acids, alkalis, solvents, etc.) biodegradation, which permitted survival many works art for centuries hostile environments, such as tropical forest. have reproduced...
New deposits of saponite have been described recently in the Madrid Basin (Madrid and Toledo provinces, Central Spain), a zone very rich Mg silicates, especially sepiolite. This is first time that high surface area saponitic material from Yunclillos deposit (Toledo province) described. The acid treatment this with diluted solutions HCl (0.62 1.25% by weight) at 25 °C for 2, 6, 24, 48 h has carried out. Although conditions employed leaching are soft, most octahedral sheet clay dissolved, as...
The OH speciation of 18 palygorskite samples from various localities were evaluated by near infrared spectroscopy (NIR) and compared to the corresponding octahedral composition derived independent, single-particle analytical electron microscopy (AEM). NIR gives evidence for dioctahedral-like (AlAlOH, AlFe3+OH, Fe3+Fe3+OH) trioctahedral-like (Mg3OH) species. Therefore, can be approximated formula yMg5 Si8O20(OH)2·(1 - y)[xMg2Fe2·(1 x)Mg2Al2] Si8O20(OH)2, where x is Fe content dioctahedral...
Palygorskite is a mineral used in wide number of industrial sectors. Currently, there are hundreds studies which palygorskite part different nanocomposites and bionanocomposites. The surface properties essential for these applications, this work, an in-depth revision done, showing that the high variability found cannot be explained only by impurities or differences analysis conditions. To further deepen knowledge palygorskitic clays, comparative study group purity samples also performed, new...
The identification of minerals is key for adequately characterizing geological materials at different scales, from the study outcrop surfaces to extraplanetary exploration. One most widely used methodologies in recent years spectroscopy visible, near infrared and short-wave wavelength ranges (VNIR-SWIR spectroscopy). In polymineralic samples position, geometry intensity absorption features are parameters that can depart single-mineral as interference phenomena occur between spectra each...
In many conurbations, the pressure on quality of living increases and affects most vulnerable human non-human populations most. This article describes a proposal for mapping design investigation how green metropolis can be developed. The approach distinguishes between landscape producing pain, ways healing, opportunities to create environments that people love. reveals concrete widespread pain in metropolis, such as impacts natural landscapes (rivers mountains), air pollution, ecological...
The combination of mineralogical, geochemical, and spectroscopy data in the visible, near-infrared, shortwave infrared (VNIR-SWIR) wavelength ranges provides determination mining spectral signatures. These signatures enable identification classification geological materials present a specific mineral deposit. Beyond their use remote sensing studies focused on studied area, have broader applications exploration extraction processes. They provide rapid, cost-effective way to classify samples...
Twenty sepiolites of known composition from different origins were analyzed to quantify the variability in structural parameters and its possible relationships with morphology. Morphology SEM analyses led classify into several groups, beyond two simple macroscopic or clay groups. X‑ray powder diffraction synchrotron light was used discuss a b cell nature cations occupancy octahedral shell. Rietveld refinement using ideal sepiolite model is performed on at temperatures: 225 °C (for...
Abstract New chemical and structural data on sepiolite-falcondoite in garnierite veins from the Falcondo Ni-laterite deposits, central Dominican Republic, are reported. Samples of Ni-sepiolite-falcondoite vary colour whitish green to depending NiO content (wt.%) amount silica present. The texture is normally schistose friable but samples with considerable quartz and/or amorphous compact hard. Back-scattered electron images indicate that composed at least three generations...