High‐Pressure Transformations and Stability of Ferromagnesite in the Earth's Mantle
Geophysical Monograph Series, Page 105-113., 2020 This book is Open Access. A digital copy can be downloaded for free from Wiley Online Library.
Explores the behavior of carbon in minerals, melts, and fluids under extreme conditions
Carbon trapped in diamonds and carbonate-bearing rocks in subduction zones are examples of the continuing exchange of substantial carbon ...
Eglantine Boulard +2 more
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From Methane to Nanodiamond Precursors in Water: Superacid-like Condensation Pathways Under Extreme Conditions. [PDF]
Angew Chem Int Ed EnglUnder extreme pressure and temperature, superionic water acts as a strong superacid, catalyzing methane polycondensation through pentacoordinated carbonium ions (CH5+). This discovery reveals the non‐classical carbocation chemistry underlying the early stages of diamond formation in water under extreme conditions.
Thévenet T +6 more
europepmc +3 more sources
Mineralogical Controls on the Ti Isotope Composition of Subduction Zone Magmas
Geochemistry, Geophysics, Geosystems, 2023 The positive Ti isotope versus SiO2‐content correlation in igneous rocks reflects the fractional crystallization of Ti‐bearing oxide minerals. However, Ti isotope variations of subduction‐related igneous rocks indicate that the Ti isotope compositions of
S. Kommescher +8 more
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Crystals, 2023 Five trifluoroacetylacetonate (tfaa−) complexes [Tm(tfaa)3(H2O)]2, [Tm(tfaa)3(H2O)2], [Tm(tfaa)3(H2O)2] · diglyme, [Tm(tfaa)3(DME)] (DME = 1,2-dimethoxyethane) and [TmCl2(tfaa)(diglyme)] (diglyme = bis(2-methoxyethyl) ether) of thulium have been ...
Daniel Fuhrmann +4 more
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Investigating crystal orientation patterns of foraminiferal tests by electron backscatter diffraction analysis [PDF]
European Journal of Mineralogy, 2020 We studied the crystallographic orientation of calcite crystals in benthic foraminifers by electron backscatter diffraction (EBSD). Individuals of two species, Gyroidinoides soldanii and Cibicidoides grimsdalei, featuring different test structures, were ...
S. Pabich +3 more
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Trace element partitioning between pyrochlore, microlite, fersmite and silicate melts
Geochemical Transactions, 2020 We present experimentally determined trace element partition coefficients (D) between pyrochlore-group minerals (Ca2(Nb,Ta)2O6(O,F)), Ca fersmite (CaNb2O6), and silicate melts.
Stephan Klemme, Jasper Berndt
doaj +1 more source
U mobilization and associated U isotope fractionation by sulfur-oxidizing bacteria
Frontiers in Microbiology, 2023 Uranium (U) contamination of the environment causes high risk to health, demanding for effective and sustainable remediation. Bioremediation via microbial reduction of soluble U(VI) is generating high fractions (>50%) of insoluble non-crystalline U(IV)
C. D. Rosendahl +3 more
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The thermal equation of state of FeTiO_3 ilmenite based on in situ X-ray diffraction at high pressures and temperatures [PDF]
, 2010 We present in situ measurements of the unit-cell volume of a natural terrestrial ilmenite (Jagersfontein mine, South Africa) and a synthetic reduced ilmenite (FeTiO_3) at simultaneous high pressure and high temperature up to 16 GPa and 1273 K.
Chen, B. +10 more
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Ein Museumsdiebstahl vor 144 Jahren
HiN - Alexander von Humboldt im Netz. Internationale Zeitschrift für Humboldt-Studien, 2017 Zu diesem Artikel liegt kein Abstract vor.
Günter Hoppe
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Origin of carbonatites—liquid immiscibility caught in the act
Nature Communications, 2022 Carbonatites are fascinating igneous rocks and their genesis remains enigmatic. Here the authors show that a Ca-rich carbonatite melt formed by liquid immiscibility from a phonolitic magma of the Laacher See volcano in the Eifel, Germany.
Jasper Berndt, Stephan Klemme
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