Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience
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Removing Arsenic from Groundwater with Iron Electrocoagulation: An Fe and As K-Edge EXAFS Study

Removing Arsenic from Groundwater with Iron Electrocoagulation: An Fe and As K-Edge EXAFS Study | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
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The authors used X-ray absorption spectroscopy to investigate the local coordination environment (<4.0 Å) of Fe and As in EC precipitates generated in synthetic Bangladesh groundwater (SBGW).

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Role of critical metals in the future markets of clean energy technologies

Role of critical metals in the future markets of clean energy technologies | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
Silver most critical element causing market bottlenecks. • Further critical elements: In, Te, PGM, REE. • Need for developing substitutions for the critical metals. • Need for new renewable energy technologies not dependent on critical elements.
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Speleothem record of climatic changes in the northern Aegean region (Greece) from the Bronze Age to the collapse of the Roman Empire

Speleothem record of climatic changes in the northern Aegean region (Greece) from the Bronze Age to the collapse of the Roman Empire | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
Interconnections of human occupation and climate shifts from the Bronze Age until the demise of the Roman Empire are investigated, based on the first high resolution isotope record of a stalagmite from northern Aegean region (Skala Marion Cave, Thassos Island, Greece).
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Colombian Trapiche Emeralds: Recent Advances in Understanding Their Formation | Gems & Gemology

Colombian Trapiche Emeralds: Recent Advances in Understanding Their Formation | Gems & Gemology | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
Proposes a model for trapiche emerald formation based on petrographic, spectroscopic, and chemical examination.
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Planktic foraminifera form their shells via metastable carbonate phases

Planktic foraminifera form their shells via metastable carbonate phases | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
The calcium carbonate shells of planktic foraminifera provide our most valuable geochemical archive of ocean surface conditions and climate spanning the last 100 million years, and play an important role in the ocean carbon cycle.
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Investigating arsenic speciation in the JEB Tailings Management Facility at McClean Lake, Saskatchewan using XAFS

Investigating arsenic speciation in the JEB Tailings Management Facility at McClean Lake, Saskatchewan using XAFS | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
• Used synchrotron-based X-ray Absorption Near-Edge Structure (XANES) to identify arsenic species in aged tailings samples • Confirmed that XANES is the optimum technique for investigating arsenic speciation • Confirmed that most arsenic in the TMF exists as scorodite • Small amount of primary arsenic mineralization (~ 1 wt%) in the TMF
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XRD Mineralogy & XRF Analysis

XRD Mineralogy & XRF Analysis | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
I want to start with a basic introduction with the XRD and XRF technology and how they are similar, and how they differ.

So, what is X-ray fluorescence? Very simply put, X-ray fluorescence uses an excitation source to excite elements, electrons within an atom. This excitation will eject an electron from its orbital and there is
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Mars study yields clues to possible cradle of life | Geology Page

Mars study yields clues to possible cradle of life | Geology Page | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
The discovery of evidence for ancient sea-floor hydrothermal deposits on Mars identifies an area on the planet that may offer clues about the origin of life
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In situ peridotitic diamond in Indus ophiolite sourced from hydrocarbon fluids in the mantle transition zone

In situ peridotitic diamond in Indus ophiolite sourced from hydrocarbon fluids in the mantle transition zone | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
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The authors report in situ diamond, graphite pseudomorphs after diamond crystals, and hydrocarbon (C-H) and hydrogen (H2) fluid inclusions in ultrahigh-pressure (UHP) peridotitic minerals of the Nidar ophiolite, Indus suture zone. Diamond occurs as octahedral inclusion along with nitrogen (N2) in orthoenstatite. Methane (CH4) also occurs with UHP clinoenstatite (>8 GPa) in orthoenstatite.
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Early trace of life from 3.95 Ga sedimentary rocks in Labrador, Canada

Early trace of life from 3.95 Ga sedimentary rocks in Labrador, Canada | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it

A clear correlation between the δ13Corg values and metamorphic grade indicates that variations in the δ13Corg values are due to metamorphism, and that the pre-metamorphic value was lower than the minimum value. We concluded that the large fractionation between the δ13Ccarb and δ13Corg values, up to 25‰, indicates the oldest evidence of organisms greater than 3.95 Ga. The discovery of the biogenic graphite enables geochemical study of the biogenic materials themselves, and will provide insight into early life not only on Earth but also on other planets.

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Origins Center – Center for the study of origins and evolution of life, planets and the universe

Origins Center – Center for the study of origins and evolution of life, planets and the universe | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
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Revealing crystalline domains in a mollusc shell single-crystalline prism

Revealing crystalline domains in a mollusc shell single-crystalline prism | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
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The authors provide the nanoscale spatial arrangement of the crystalline structure within the ‘single-crystalline’ prisms of the prismatic layer of a Pinctada margaritifera shell, exploiting three-dimensional X-ray Bragg ptychography microscopy.
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New Molecular Simulation Method To Determine Both Aluminum and Cation Location in Cationic #Zeolites

New Molecular Simulation Method To Determine Both Aluminum and Cation Location in Cationic #Zeolites | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
New Molecular Simulation Method To Determine Both Aluminum and Cation Location in Cationic Zeolites
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The consequences of aluminum distribution on solid properties such as extraframework Na+ cation location have been analyzed and successfully compared with the available information for different zeolite topologies.
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When water meets iron at Earth's core–mantle boundary

When water meets iron at Earth's core–mantle boundary | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it

Abstract.Hydrous minerals in subducted crust can transport large amounts of water into Earth's deep mantle.

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When water meets iron at the core–mantle boundary, they react to form an interlayer with an extremely oxygen-rich form of iron, iron dioxide, together with iron hydride.
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Complex Behavior of Caffeine Crystallites on Muscovite Mica Surfaces

Complex Behavior of Caffeine Crystallites on Muscovite Mica Surfaces | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
Caffeine deposited by hot wall epitaxy on muscovite mica results in needle-like crystallites with defined azimuthal alignment. The long needle axis aligns with respect to the substrate resulting in distinct growth directions being visible. Topographic and X-ray based investigations reveal that directed growth is facilitated by the pseudo 3-fold symmetry on the muscovite mica (001) surface.
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What is a Crystal? - International Gem Society - IGS

What is a Crystal? - International Gem Society - IGS | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
Learn the scientific definition of crystal used by gemologists and answer some basic questions about what is and is not a crystal.
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Clay mineral formation under oxidized conditions and implications for paleoenvironments and organic preservation on Mars

Clay mineral formation under oxidized conditions and implications for paleoenvironments and organic preservation on Mars | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
Clay mineral-bearing locations have been targeted for martian exploration as potentially habitable environments and as possible repositories for the preservation of organic matter.
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Cubic zirconia in >2370 °C impact melt records Earth's hottest crust

Cubic zirconia in >2370 °C impact melt records Earth's hottest crust | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
Cubic zirconia required >2370 °C melt, which is hottest recorded on Earth's surface.
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Comparison of Solid-Water Partitions of Radiocesium in River Waters in #Fukushima and #Chernobyl Areas

Comparison of Solid-Water Partitions of Radiocesium in River Waters in #Fukushima and #Chernobyl Areas | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
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Cs speciation and organic matter-clay mineral interaction were studied: (i) extended X-ray absorption fine structure showed that the contribution of outer-sphere complex of Cs on particulate matters is larger in Chernobyl than in Fukushima and (ii) scanning transmission X-ray microscope revealed larger association of humic substances and clay minerals in Chernobyl partly due to high [Ca2+] in the Pripyat River.
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Importance of interlayer H bonding structure to the stability of layered minerals

Importance of interlayer H bonding structure to the stability of layered minerals | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
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The authors report a new strategy that uses the focused electron beam to probe the effect of differences in hydrogen bonding networks on mineral solubility. In this regard, the dissolution behavior of boehmite (γ-AlOOH) and gibbsite (γ-Al(OH)3) were compared and contrasted in real time via liquid cell electron microscopy.
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How the United States plans to trap its biggest stash of nuclear-weapons waste in glass

How the United States plans to trap its biggest stash of nuclear-weapons waste in glass | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
After decades of delays, a challenging clean-up project is gaining ground.
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Global nickel anomaly links Siberian Traps eruptions and the latest Permian mass extinction

Global nickel anomaly links Siberian Traps eruptions and the latest Permian mass extinction | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
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The authors propose that the source of the nickel anomalies at the P-T boundary were Ni-rich volatiles released by the Siberian volcanism, and by coeval Ni-rich magma intrusions. The peaks in nickel abundance correlate with negative δ13C and δ18O anomalies, suggesting that explosive reactions between magma and coal during the Siberian flood-basalt eruptions released large amounts of CO2 and CH4 into the atmosphere, causing severe global warming and subsequent mass extinction.
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Plate tectonics started at least 3.5 billion years ago

Plate tectonics started at least 3.5 billion years ago | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
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Hypothetical ultralow-density ice polymorphs

Hypothetical ultralow-density ice polymorphs | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it

It is found that a hypothetical zeolitic ice phase is less dense and more stable than the sparse ice structures reported by Huang et al. [Chem. Phys. Lett. 671, 186 (2017)].

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Mechanochemical Route and Recrystallization Strategy To Fabricate Mordenite Nanoparticles from Natural Zeolites

Mechanochemical Route and Recrystallization Strategy To Fabricate Mordenite Nanoparticles from Natural Zeolites | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
Mechanochemical Route and Recrystallization Strategy To Fabricate Mordenite Nanoparticles from Natural Zeolites
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