Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience
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University of Saskatchewan to build new Synchrotron beamline to study the role of metals in the human body

University of Saskatchewan to build new Synchrotron beamline to study the role of metals in the human body | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
The provincial government has given the University of Saskatchewan 2.1-million dollars for nine research projects.
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More than half of the budget will be used for the new BioXAS beamline project, Canada Research Chair and lead researcher Graham George said. The beamline will be useful in researching Alzheimer's disease and multiple sclerosis. "Both of these diseases involve metals". "We're not really sure if they're part of the problem or they're part of the cause of the problem, but we know they're involved and we want to understand this."

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Geochemical Perspectives Letters - Molecular hydrogen in mantle minerals

Geochemical Perspectives Letters - Molecular hydrogen in mantle minerals | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
Geochemical Perspectives Letters is a new journal of the European Association of Geochemistry.
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The presence of dissolved molecular H2 in the minerals of the lower mantle could explain why magmas sourced in this region are rich in hydrogen, despite the fact that lower mantle minerals contain almost no OH groups.
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Computational Investigation of Technetium(IV) Incorporation into Magnetite (Fe3O4)

Computational Investigation of Technetium(IV) Incorporation into Magnetite (Fe3O4) | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
Recent experiments show that the inverse spinel, magnetite [Fe(II)Fe(III)2O4], can incorporate Tc(IV) into its octahedral sublattice. In that same class of materials, trevorite [Ni(II)Fe(III)2O4] is also being investigated for its ability to host Tc(IV).
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A glimpse into the Roman finances of the Second Punic War through silver isotopes

A glimpse into the Roman finances of the Second Punic War through silver isotopes | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
Geochemical Perspectives Letters is a new journal of the European Association of Geochemistry.
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Environmental Hazards: Quantifying rates and mechanisms of weathering - Prof Eric Oelkers

Professor Eric Oelkers talks about aqueous geochemistry and global sustainability as part of the Environmental Hazards research group at IEPS.
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The Beginnings of Life May Lie Within Comet Craters

The Beginnings of Life May Lie Within Comet Craters | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
Geochemists from the Trinity College Dublin’s School of Natural Sciences believe they may have figured out not only where, but also how life first began on Earth.
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Interactive map of the chemistry and mineralogy of soils in the United States | American Geosciences Institute

Interactive map of the chemistry and mineralogy of soils in the United States | American Geosciences Institute | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
RT @AGI_GeoIssues: #MapOfTheDay is a doozy: @USGS maps of soil chemistry and mineralogy for the entire US: https://t.co/vPnfkjdLb3 https://…
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EMC2016: #clays, #zeolites and nanostructured minerals: from mineralogy to applications in industry and environment

EMC2016: #clays, #zeolites and nanostructured minerals: from mineralogy to applications in industry and environment | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
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A vacuole-like compartment concentrates a disordered calcium phase in a key coccolithophorid alga

A vacuole-like compartment concentrates a disordered calcium phase in a key coccolithophorid alga | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
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The authorsstudy cryo-preserved cells of the dominant coccolithophore Emiliania huxleyi using state-of-the-art nanoscale imaging and spectroscopy.
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Meteorites Help Answer Questions About Solar System Evolution

A team of eight scientists spent two-months in the frozen landscape of Antarctica as part of the Antarctic Search for Meteorites (ANSMET), a 40-year progra
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Asbestiform and nonasbestiform amphiboles: iron oxidation, mineral morphology, and potential health effects may all be interrelated

Asbestiform and nonasbestiform amphiboles: iron oxidation, mineral morphology, and potential health effects may all be interrelated | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
Ath Godelitsas's insight:
The authors obtained oriented Fe-XANES spectra on three amphibole bundles of fiber (i.e., asbestiform morphology), two single-crystal fragments (i.e., nonasbestiform morphology), and one aggregate of thousands of smaller particles (termed herein a “puffball”) by use of a spindle stage mounted on beamline X26A, National Synchrotron Light Source, Brookhaven National Lab.
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Organophosphate Precipitation at the Calcite–Water Interface by in Situ Atomic-Force Microscopy

Organophosphate Precipitation at the Calcite–Water Interface by in Situ Atomic-Force Microscopy | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
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Here, by using in situ atomic-force microscopy (AFM) to visualize the dissolution of calcite (1014) faces, the authors show that the presence of G6P results in morphology changes of etch pits from the typical rhombohedral to a fan-shaped form.
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Behavior of the Chemical Potential in Calcite and Magnesite Crystals

Behavior of the Chemical Potential in Calcite and Magnesite Crystals | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
The behavior of the chemical potential of the species CaCO3 and MgCO3 in proximity of the (10.4) crystal face of calcite and magnesite is determined at the quantum–mechanical level by adopting a recent calculation strategy conceived in our research laboratory. A very peculiar trend of this quantity from the (10.4) surface to the center of the calcite and magnesite crystals was observed.
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Most diamonds were created equal

Most diamonds were created equal | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
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The authors examined 30 gemmy twinned diamonds with evolved nitrogen aggregation (high B/(A+B)B/(A+B) ratio).
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Closer Look at Arsenic Adsorption onto Ferrihydrite under Competitive Conditions

Closer Look at Arsenic Adsorption onto Ferrihydrite under Competitive Conditions | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
Ath Godelitsas's insight:
The effect of As(III) on the adsorption of As(V) increased with an increase in pH, and the adsorption of As(V) was almost absent at pH 9 at an adsorbent dosage of 1 g/L and at pH 8 at an adsorbent dosage of 0.5 g/L. In the range of ferrihydrite dosages from 0.2 to 1.6 g/L, As(III) was adsorbed preferentially over As(V) under the availability of less adsorbent.
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Atmospheric Processing of Volcanic Glass: Effects on Iron Solubility and Redox Speciation

Atmospheric Processing of Volcanic Glass: Effects on Iron Solubility and Redox Speciation | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
By providing new insight into the form(s) of Fe associated with ash as wet aerosol versus cloud droplet, we improve knowledge of atmospheric controls on volcanogenic Fe delivery to the ocean.
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Molecularly-Limited Fractal Surface Area of Mineral Powders

Molecularly-Limited Fractal Surface Area of Mineral Powders | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
The topic of the specific surface area (SSA) of powders is not sufficiently described in the literature in spite of its nontrivial contribution to adsorption and dissolution processes. Fractal geometry provides a way to determine this parameter via relation SSA ~ x(D − 3)s(2 − D), where x (m) is the particle size and s (m) is a scale. Such a relation respects nano-, micro-, or macro-topography on the surface. Within this theory, the fractal dimension 2 ≤ D < 3 and scale parameter s plays a significant role. The parameter D may be determined from BET or dissolution measurements on several samples, changing the powder particle sizes or sizes of adsorbate molecules. If the fractality of the surface is high, the SSA does not depend on the particle size distribution and vice versa. In this paper, the SSA parameter is analyzed from the point of view of adsorption and dissolution processes. In the case of adsorption, a new equation for the SSA, depending on the term (2 − D)∙(s2 − sBET)/sBET, is derived, where sBET and s2 are effective cross-sectional diameters for BET and new adsorbates. Determination of the SSA for the dissolution process appears to be very complicated, since the fractality of the surface may change in the process. Nevertheless, the presented equations have good application potential.
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Metal-Aid EU Project

Metal-Aid EU Project | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
METAL-AID is a European Horizon 2020 Marie Sklodowska Curie Initial Training Network (ITN) designed to address the problem of contaminated water sites across Europe. The project is coordinated by University of Copenhagen and involves 11 different beneficiaries throughout Europe. The project starts on July 1, 2016 and runs for four years. Over the course of the project, Metal-Aid will train 14 Early Stage Researchers.
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Chemical Oceanography and Geology, Geochemistry, and Geobiology Seminars (COG3): Stephen Parman, Brown | MIT Department of Earth, Atmospheric and Planetary Sciences

Chemical Oceanography and Geology, Geochemistry, and Geobiology Seminars (COG3): Stephen Parman, Brown | MIT Department of Earth, Atmospheric and Planetary Sciences | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
"When did the continents grow?" The continental crust is a unique chemical and physical feature of the Earth. When it formed is a long-standing question that has been reinvigorated by new analytical methods.
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Preservation of Earth-forming events in the tungsten isotopic composition of modern flood basalts

Preservation of Earth-forming events in the tungsten isotopic composition of modern flood basalts | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
High-precision tungsten isotopic data from rocks from two large igneous provinces, the North Atlantic Igneous Province and the Ontong Java Plateau, reveal preservation to the Phanerozoic of tungsten isotopic heterogeneities in the mantle.
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Arsenic biogeochemistry at the outflow of an alkaline sulfide-rich hot spring

Arsenic biogeochemistry at the outflow of an alkaline sulfide-rich hot spring | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
Alkaline sulfide-rich hot springs provide a unique environment for microbial community and arsenic (As) biogeochemistry.
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Mechanisms of chromate adsorption on boehmite

Mechanisms of chromate adsorption on boehmite | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
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In this study, the authors characterized the mechanisms of chromate adsorption on boehmite (γ-AlOOH) using a combination of extended X-ray absorption fine structure (EXAFS) measurements, in situ attenuated total reflectance Fourier transform infrared spectroscopy, and quantum chemical calculations.
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#Asbestos reactivity is dependent on iron surface topochemistry and
nuclearity

#Asbestos reactivity is dependent on iron surface topochemistry and<br/>nuclearity | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
• New surface reactivity results on tremolite asbestos by XPS, HR-TEM and ICP-AES
• Surface morphology and composition change upon time after incubation at pH 7.4.
• Presence of nano-clustered iron explains the high reactivity of these asbestos.
• Low amounts of iron act as catalyzer of the ROS production.
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Direct Nanoscale Imaging Reveals the Growth of Calcite Crystals via Amorphous Nanoparticles

Direct Nanoscale Imaging Reveals the Growth of Calcite Crystals via Amorphous Nanoparticles | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
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The authors show, using in situ atomic force microscopy and complementary techniques, that faceted calcite can grow via a nonclassical particle-mediated colloidal crystal growth mechanism that at the nanoscale mirrors classical ion-mediated growth, and involves a layer-by-layer attachment of amorphous calcium carbonate (ACC) nanoparticles, followed by their restructuring and fusion with the calcite substrate in perfect crystallographic registry. The ACC-to-calcite transformation occurs by an interface-coupled dissolution–reprecipitation mechanism and obliterates or preserves the nanogranular texture of the colloidal growth layer in the absence or presence of organic (macro)molecules, respectively.
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Hydrothermal atomic force microscopy observations of barite step growth rates as a function of the aqueous barium-to-sulfate ratio

Hydrothermal atomic force microscopy observations of barite step growth rates as a function of the aqueous barium-to-sulfate ratio | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
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