Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience
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Geogenic As contamination in China groundwater (linked to alkaline desorption processes and reductive dissolution of Fe-hydroxides)

Geogenic As contamination in China groundwater (linked to alkaline desorption processes and reductive dissolution of Fe-hydroxides) | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
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The authors developed a statistical risk model that classifies safe and unsafe areas with respect to geogenic arsenic contamination in China, using the threshold of 10 micrograms per liter, the World Health Organization guideline and current Chinese standard for drinking water. They estimate that 19.6 million people are at risk of being affected by the consumption of arsenic-contaminated groundwater.

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Control of Earth-like magnetic fields on the transformation of ferrihydrite to hematite and goethite

Control of Earth-like magnetic fields on the transformation of ferrihydrite to hematite and goethite | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
Hematite and goethite are the two most abundant iron oxides in natural environments.
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Ferrihydrite was aged at 95 °C in magnetic fields ranging from ~0 to ~100 μT. The results indicate a large influence of the applied magnetic field on hematite and goethite growth from ferrihydrite.
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Nanoanalytical Electron Microscopy Reveals a Sequential Mineralization Process

Nanoanalytical Electron Microscopy Reveals a Sequential Mineralization Process | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
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To better understand the process of bone mineralization in the extracellular matrix, the authors used nanoanalytical electron microscopy techniques to examine an in vitro model of bone formation.
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Effect of pH on Amorphous Calcium Carbonate Structure and Transformation

Effect of pH on Amorphous Calcium Carbonate Structure and Transformation | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
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The authors used pair distribution function (PDF) analysis to provide evidence that the local structure of ACC gradually changes as the pH of the synthesis solutions is increased from 10.6 to 12.7, at ambient conditions.
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Cook Island artifact geochemistry demonstrates spatial and temporal extent of pre-European interarchipelago voyaging in East Polynesia

Cook Island artifact geochemistry demonstrates spatial and temporal extent of pre-European interarchipelago voyaging in East Polynesia | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
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An X-ray spectroscopic perspective on Messinian evaporite from Sicily

An X-ray spectroscopic perspective on Messinian evaporite from Sicily | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
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The dominant molecular host site of Mg and S obtained by X-ray absorption near edge structure (XANES) is applied to specify the hydrochemistry of hypersaline brines and the presence of diagenetic minerals, thus shedding light on evaporative concentration processes in the Caltanissetta Basin of Sicily.
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Direct and Facile Room-Temperature Synthesis of Nanocrystalline Gypsum

Direct and Facile Room-Temperature Synthesis of Nanocrystalline Gypsum | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
Scanning electron micrographs present an interesting phenomenon of formation of microcracks in the nano-CaFeO2.5 pellet during oxidation, leading to nucleation of gypsum within the cracks. The hardness and compressive strength improved by a factor of 1.5 (63% higher) and 1.7, respectively.
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Thin Ice Films at Mineral Surfaces

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Thin ice films at the surfaces of the majority of minerals considered in this work (i.e. metal (oxy)(hydr)oxides, phyllosilicates, silicates, volcanic ash, Arizona Test Dust) produced intense O-H stretching bands at ~3400 cm-1, attenuated bands at ~3200 cm-1 and liquid-water-like bending band at ~1640 cm-1, irrespective of structure and composition. Illite, a non-expandable phyllosilicate, is the only mineral that stabilized a form of ice that was strongly resilient to sublimation in temperatures as low as -50 °C.
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Frosty cold nights year-round on Mars may stir dust

Frosty cold nights year-round on Mars may stir dust | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
Some dusty parts of Mars get as cold at night year-round as the planet's poles do in winter, even regions near the equator in summer, according to new NASA findings based on Mars Reconnaissance Orbiter observations.
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New mineral Kalgoorlieite named after historic mining town

New mineral Kalgoorlieite named after historic mining town | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
A new mineral has been discovered in historical ore samples taken from the Kalgoorlie Super Pit.
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Shock synthesis of quasicrystals with implications for their origin in asteroid collisions

Shock synthesis of quasicrystals with implications for their origin in asteroid collisions | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
The singular occurrence, to date, of natural quasicrystals requires an explanation both of the possibility and of the rarity of their formation outside of the laboratory. Successful synthesis by an experimental shock, with starting materials similar to the exotic intermetallic alloys in the Khatyrka meteorite, demonstrates a mechanism that is feasible in space but not in any natural setting on Earth. The previously unrecognized composition of the synthesized quasicrystal, the first, to our knowledge, to be created by shocking discrete bulk starting materials, demonstrates a method for discovery of previously unknown quasicrystal compositions.
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Discovery of alunite in Cross crater, Terra Sirenum, Mars: Evidence for acidic, sulfurous waters

Discovery of alunite in Cross crater, Terra Sirenum, Mars: Evidence for acidic, sulfurous waters | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
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Combining spectral data with high-resolution images, the authors map a large (10 km × 5 km) alunite-bearing deposit in southwest Cross crater, widespread kaolin-bearing sediments with variable amounts of alunite that are layered in <10 m scale beds, and silica- and/or montmorillonite-bearing deposits that occupy topographically lower, heavily fractured units.
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Water of Hydration Dynamics in Minerals Gypsum and Bassanite: Ultrafast 2D IR Spectroscopy of Rocks

Water of Hydration Dynamics in Minerals Gypsum and Bassanite: Ultrafast 2D IR Spectroscopy of Rocks | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
Here ultrafast nonlinear infrared (IR) techniques, two-dimensional infrared (2D IR) and polarization selective pump–probe (PSPP) spectroscopies, were used to measure the dynamics and disorder of water of hydration in two minerals, gypsum (CaSO4·2H2O) and bassanite (CaSO4·0.5H2O).
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NASA scientists discover unexpected mineral on Mars

NASA scientists discover unexpected mineral on Mars | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
National Academy of Sciences
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Which Inorganic Structures are the Most Complex?

Which Inorganic Structures are the Most Complex? | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
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Over the last hundred years, about 150 000 of inorganic crystal structures have been elucidated and visualized.  In this review the author uses information theory to characterize complexity of inorganic structures in terms of their information content.
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Measurement of Uranium Isotopes in Particles of U3O8 by Secondary Ion Mass Spectrometry–Single-Stage Accelerator Mass Spectrometry (SIMS–SSAMS)

Measurement of Uranium Isotopes in Particles of U3O8 by Secondary Ion Mass Spectrometry–Single-Stage Accelerator Mass Spectrometry (SIMS–SSAMS) | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
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A commercial secondary ion mass spectrometer (SIMS) was coupled to a ± 300 kV single-stage accelerator mass spectrometer (SSAMS).
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IMAS in action - Research, Study, Community

Video highlights of the work of staff and researchers at the Institute of Marine and Antarctic Studies (IMAS) in Hobart, Tasmania. Based at the University
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Voyage to underwater volcanoes yields explosive findings

Voyage to underwater volcanoes yields explosive findings | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
An IMAS research trip aboard CSIRO's Investigator gives a rare glimpse of erupting volcano in the Southern Ocean.
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Isotopic Evidence for Reductive Immobilization of #Uranium Across a Roll-Front Mineral Deposit

Isotopic Evidence for Reductive Immobilization of #Uranium Across a Roll-Front Mineral Deposit | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
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the authors use uranium (U) isotope ratios to detect and quantify the extent of natural U reduction in groundwater across a roll front redox gradient.
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Formation of gypsum through the aggregation of sub-3nanometre primary species

Formation of gypsum through the aggregation of sub-3nanometre primary species | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
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Using truly in situ and fast time-resolved small-angle X-ray scattering, the authors quantify the four-stage solution-based nucleation and growth of gypsum (CaSO4·2H2O), an important mineral phase on Earth and Mars.
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The Asian monsoon over the past 640,000 years and ice age terminations

The Asian monsoon over the past 640,000 years and ice age terminations | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
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