Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience
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Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience
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@WWU_Muenster - Institut für Mineralogie

@WWU_Muenster - Institut für Mineralogie | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
Mineralogie
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The Institute for Mineralogy focuses on research and teaching mainly in these topics: Mineralogy, Petrology, Geochemistry.

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Thin Water Films at Multifaceted Hematite Particle Surfaces

Thin Water Films at Multifaceted Hematite Particle Surfaces | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
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This study resolves the nature of thin water film formation at multifaceted hematite (α-Fe2O3) nanoparticle surfaces with crystallographic faces resolved by selected area electron diffraction.

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Potential Sites for Ice Nucleation on Aluminosilicate Clay Minerals and Related Materials

Potential Sites for Ice Nucleation on Aluminosilicate Clay Minerals and Related Materials | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
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This Perspective focuses on what is currently known about surface sites for ice nucleation on aluminosilicate clay minerals, which are commonly found in ice residuals, as well as related materials.

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A mineralogical study in contrasts: highly mineralized whale rostrum and human enamel

A mineralogical study in contrasts: highly mineralized whale rostrum and human enamel | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
The outermost enamel of the human tooth and the rostrum of the whale Mesoplodon densirostris are two highly mineralized tissues that contain over 95 wt.% mineral, i.e., bioapatite.
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Atomic force microscopy measurements of bacterial adhesion and biofilm formation onto clay-sized particles

Atomic force microscopy measurements of bacterial adhesion and biofilm formation onto clay-sized particles | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
Bacterial adhesion onto mineral surfaces and subsequent biofilm formation play key roles in aggregate stability, mineral weathering, and the fate of contaminants in soils.
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Atomic force microscopy (AFM) was used to determine the adhesion forces between bacteria and goethite in water and to gain insight into the nanoscale surface morphology of the bacteria-mineral aggregates and biofilms formed on clay-sized minerals.

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Nanostructure surveys of bone by small-angle scattering tensor tomography

Nanostructure surveys of bone by small-angle scattering tensor tomography | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it

Computed-tomography reconstruction obtained from the transmitted intensity using standard filtered backprojection. b, Orientation of bone ultrastructure as determined using SAS tensor tomography.

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Structural analysis of hierarchically organized zeolites

Structural analysis of hierarchically organized zeolites | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
Advances in materials synthesis bring about many opportunities for technological applications, but are often accompanied by unprecedented complexity. This is clearly illustrated by the case of hierarchically organized zeolite catalysts, a class of crystalline microporous solids that has been revolutionized by the engineering of multilevel pore architectures, which combine unique chemical functionality with efficient molecular transport. Three key attributes, the crystal, the pore and the active site structure, can be expected to dominate the design process. This review examines the adequacy of the palette of techniques applied to characterize these distinguishing features and their catalytic impact.
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Sea urchin spurs new ideas for lightweight materials

Sea urchin spurs new ideas for lightweight materials | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
Materials researchers love sea creatures. Mother-of-pearl provokes ideas for smooth surfaces, clams inspire gluey substances, shark’s skin is used to develop materials that reduce drag in water, and so on.
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Iron, a key nutrient for nearly all life, in atmospheric dust of late Paleozoic

Iron, a key nutrient for nearly all life, in atmospheric dust of late Paleozoic | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it

See also: http://www.geosociety.org/news/pr/2015/15-87.htm

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The authors report a unique Fe relationship for Upper Pennsylvanian mudrock of eolian origin that records lowstand (glacial) conditions within a carbonate buildup of western equatorial Pangaea (western United States) well removed from other detrital inputs.

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Microbial mediation of complex subterranean mineral structures

Microbial mediation of complex subterranean mineral structures | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
Helictites—an enigmatic type of mineral structure occurring in some caves—differ from classical speleothems as they develop with orientations that defy gravity.
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Application of X-ray computed tomography in gold mineralogy

Application of X-ray computed tomography in gold mineralogy | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
We report the development of laboratory based hyperspectral X-ray computed tomography which allows the internal elemental chemistry of an object to be reconstructed and visualised in three dimensions.
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Diamond formation due to a pH drop during fluid-rock interactions

Diamond formation due to a pH drop during fluid-rock interactions | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
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The role of pH changes associated with water–silicate rock interactions during diamond formation is unknown. The authors show that diamonds could form due to a drop in pH during water–rock interactions.

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SuperSTEM : The EPSRC National Facility for Aberration Corrected STEM

SuperSTEM : The EPSRC National Facility for Aberration Corrected STEM | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it

SuperSTEM is the EPSRC National Facility for Aberration-Corrected Scanning Transmission Electron Microscopy. It supports a wide variety of multi-disciplinary research by providing access to cutting-edge instrumentation, state-of-the-art data analysis as well as expertise and training in electron microscopy.

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Controlled Growth of Ferrihydrite Branched Nanosheet Arrays and Their Transformation to Hematite Nanosheet Arrays

Controlled Growth of Ferrihydrite Branched Nanosheet Arrays and Their Transformation to Hematite Nanosheet Arrays | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
Ath Godelitsas's insight:

In this work, a facile and mild solvothermal synthesis of unique ferrihydrite branched nanosheet arrays vertically aligned on FTO substrate was achieved at around 100 °C.

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The Nanoscale Basis of CO2 Trapping for Geologic Storage

The Nanoscale Basis of CO2 Trapping for Geologic Storage | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
Ath Godelitsas's insight:

Three key parameters that have a nanoscale basis and that contribute uncertainty to predictions of CO2 trapping are the vertical permeability kv of seals, the residual CO2 saturation Sg,r in reservoir rocks, and the reactive surface area ar of silicate minerals.

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BGS Geoheritage – images from the collections: CALX carbonata (calcite) from British mineralogy by James Sowerby 1802-1817

BGS Geoheritage – images from the collections: CALX carbonata (calcite) from British mineralogy by James Sowerby 1802-1817 | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
RT @scotfot: CALX carbonata from British mineralogy by James Sowerby 1802-1817 https://t.co/izqkaRQoKq https://t.co/OOnbPlCjJL
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Orientation of bone ultrastructure as retrieved from small-angle scattering (SAS) tensor tomography

Orientation of bone ultrastructure as retrieved from small-angle scattering (SAS) tensor tomography | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
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Sponge-like nanoporous single crystals of gold

Sponge-like nanoporous single crystals of gold | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it

These crystals are found to grow following solidification of a eutectic composition melt that forms as a result of the dewetting of nanometric thin films.

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Robert Hazen - Chance, Necessity, and the Origins of Life

Robert Hazen - Chance, Necessity, and the Origins of Life | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
Earth's 4.5 billion year history is a complex tale of deterministic physical and chemical processes, as well as "frozen accidents". Most models of lif
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A biocompass exhibits spontaneous alignment in magnetic field of the Earth.

A biocompass exhibits spontaneous alignment in magnetic field of the Earth. | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
A polymeric protein complex consisting of a newly identified magnetoreceptor protein and known magnetoreception-related photoreceptor cryptochromes exhibits spontaneous alignment in magnetic fields.
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The magnetosensing complex consists of the identified putative magnetoreceptor and known magnetoreception-related photoreceptor cryptochromes (Cry), has the attributes of both Cry- and iron-based systems, and exhibits spontaneous alignment in magnetic fields, including that of the Earth.

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Boron-containing pigments from a Jurassic putative red alga

Boron-containing pigments from a Jurassic putative red alga | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
boron-containing pigments from a Jurassic putative red alga,
Ath Godelitsas's insight:

The authors report the full structure and absolute configuration of the borolithochromes, enigmatic boron-containing pigments from a Jurassic putative red alga, from samples of less than 50 μg using microcryoprobe NMR, circular dichroism spectroscopy, and density functional theory calculations and reveal their polyketide origin.

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Synchrotron Transmission X-ray Microscopy of dinosaur teeth

Synchrotron Transmission X-ray Microscopy of dinosaur teeth | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
The relationship between tooth form and dietary preference is a crucial issue in vertebrate evolution. However, the mechanical properties of a tooth are influenced not only by its shape but also by its internal structure.
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Enhanced cellular preservation by clay minerals in 1 billion-year-old lakes

Enhanced cellular preservation by clay minerals in 1 billion-year-old lakes | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it
Organic-walled microfossils provide the best insights into the composition and evolution of the biosphere through the first 80 percent of Earth history.
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This work shows that clay minerals can provide an exceptionally high fidelity of microfossil preservation and extends the known geological range of this fossilization style by almost 500 Ma.

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Morphology and Ion Dynamics in Ca2+-Mediated Natural Organic Matter Floccs

Morphology and Ion Dynamics in Ca2+-Mediated Natural Organic Matter Floccs | Mineralogy, Geochemistry, Mineral Surfaces & Nanogeoscience | Scoop.it

Combined X-ray diffraction (XRD), helium ion microscopy (HeIM), and 43Ca nuclear magnetic resonance (NMR) results provide novel insight into the nano- and microstructure of flocculated NOM

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