Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience
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Surface chemistry allows for abiotic precipitation of dolomite at low temperature

Surface chemistry allows for abiotic precipitation of dolomite at low temperature | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
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The authors report the abiotic synthesis of dolomite at 25 °C, and demonstrate that carboxylated surfaces on organic matter catalyze precipitation through complexation between carboxyl groups and Mg2+, removing water to make Mg2+ available for dolomite precipitation. This mechanism is consistent with dolomite formation in depositional environments rich in organic matter.

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Rock Found in Egypt is Unlike Anything Ever Seen in Our Solar System

Scientists at the University of Johannesburg say the Hypatia stone found in Egypt in 1996 contains materials never seen before in our solar system and ma
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Palaeodeserts - Climate Change and Hominin Evolution in the Arabian Desert

Palaeodeserts - Climate Change and Hominin Evolution in the Arabian Desert | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
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Opposite effects of dissolved oxygen on the removal of As(III) and As(V) by carbonate structural Fe(II)

Opposite effects of dissolved oxygen on the removal of As(III) and As(V) by carbonate structural Fe(II) | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
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X-ray diffraction and infrared spectroscopic analyses indicated that crystalline parasymplesite (Fe(II)3(AsO4)2·8H2O) was formed when As(V) was removed under anoxic conditions, while an amorphous Fe-As-containing precipitate was formed when As(III) was removed under oxic conditions.
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Magnetotactic bacteria as a new model for P sequestration in the ferruginous Lake Pavin

Magnetotactic bacteria as a new model for P sequestration in the ferruginous Lake Pavin | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
Magnetotactic bacteria (MTB) are a phylogenetically and metabolically diverse group of bacteria biomineralising intracellular magnetites and/or greigites and moving along magnetic field lines.
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PANalytical's timeline. More than a century of experience.

PANalytical has become one of the top two suppliers for analytical X-ray instrumentation, applications and services in the world. With its own X-ray tub
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An essential role for continental rifts and lithosphere in the deep carbon cycle

An essential role for continental rifts and lithosphere in the deep carbon cycle | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
The continental lithosphere is a vast store for carbon. The carbon has been added and reactivated by episodic freezing and re-melting throughout geological history. Carbon remobilization can lead to significant variations in CO2 outgassing and release in the form of magmas from the continental lithosphere over geological timescales.
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Trace Element Compositions and Defect Structures of High-Purity Quartz from the Southern Ural Region, Russia

Trace Element Compositions and Defect Structures of High-Purity Quartz from the Southern Ural Region, Russia | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it

The analytical combination of cathodoluminescence (CL) microscopy and spectroscopy, electron paramagnetic resonance (EPR) spectroscopy, and trace-element analysis by inductively coupled plasma mass spectrometry (ICP-MS) revealed that almost all investigated quartz samples showed very low concentrations of trace elements (cumulative concentrations of <50 ppm with <30 ppm Al and <10 ppm Ti) and low abundances of paramagnetic defects, defining them economically as “high-purity” quartz (HPQ) suitable for high-tech applications.

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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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Nanoscale geochemical and geomechanical characterization of organic matter in shale

Nanoscale geochemical and geomechanical characterization of organic matter in shale | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
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The authors demonstrate the first application of atomic force microscopy-based infrared spectroscopy (AFM-IR) to measure the chemical and mechanical heterogeneity of OM in shale at the nanoscale, orders of magnitude finer than achievable by traditional chemical imaging tools such as infrared microscopy.
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Rare earth element geochemistry characteristics of seawater and porewater from deep sea in western Pacific

Rare earth element geochemistry characteristics of seawater and porewater from deep sea in western Pacific | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it

Deep-sea sediments contain high concentrations of rare earth element (REE) which have been regarded as a huge potential resource. Understanding the marine REE cycle is important to reveal the mechanism of REE enrichment.

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School on Novel Experimental Methodologies for Synchrotron Radiation. Andreas Karydas, Director

Interview to Andreas-Germanos Karydas (International Atomic Energy Agency) one of the directors of the "School on Novel Experimental Methodologies fo
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Lecture: Arsenic contamination of groundwaters

Lecture given by Prof. Dr. Lenny H.E. Winkel (ETH Zurich, Switzerland), 2017 EAG Distinguished Lecturer, Institute of Geography and Earth Sciences, Eötvö
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DESY News: Clay mineral waters Earth&apos;s mantle from the inside - Deutsches Elektronen-Synchrotron DESY

DESY News: Clay mineral waters Earth&apos;s mantle from the inside - Deutsches Elektronen-Synchrotron DESY | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
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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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