Auflistung Geochemie, Mineralogie, Petrologie nach Schlagwort "high pressure"
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Combined X-ray and neutron single-crystal diffraction in diamond anvil cells
(Journal of Applied Crystallography, 2019)It is shown that it is possible to perform combined X-ray and neutron single-crystal studies in the same diamond anvil cell (DAC). A modified Merrill–Bassett DAC equipped with an inflatable membrane filled with He gas has ... -
HTD2: a single‐crystal X‐ray diffractometer for combined high‐pressure/low‐temperature experiments at laboratory scale
(Journal of Applied Crystallography, 2022-09-29)High‐pressure (HP) X‐ray diffraction experiments at low temperature (LT) require dedicated instruments as well as non‐standard sample environments and measuring strategies. This is especially true when helium cryogenic ... -
Radiometric Temperature Measurements in Nongray Ferropericlase With Pressure- Spin- and Temperature-Dependent Optical Properties
(Journal of Geophysical Research: Solid Earth, 2019)Accurate temperature determination is central to measurements of physical and chemical properties in laser-heated (LH) diamond anvil cells (DACs). Because the optical properties of samples at high pressure-temperature (P-T) ... -
Strong Sequestration of Hydrogen Into the Earth's Core During Planetary Differentiation
(Geophysical Research Letters, 2020)We explore the partitioning behavior of hydrogen between coexisting metal and silicate melts at conditions of the magma ocean and the current core–mantle boundary with the help of density functional theory molecular dynamics. ... -
Sub‐micrometer focusing setup for high‐pressure crystallography at the Extreme Conditions beamline at PETRA III
(Journal of Synchrotron Radiation, 2022-04-05)Scientific tasks aimed at decoding and characterizing complex systems and processes at high pressures set new challenges for modern X‐ray diffraction instrumentation in terms of X‐ray flux, focal spot size and sample ... -
Synthesis, crystal structure and structure–property relations of strontium orthocarbonate, Sr2CO4
(Acta Crystallographica Section B, 2021-02-09)Carbonates containing CO4 groups as building blocks have recently been discovered. A new orthocarbonate, Sr2CO4 is synthesized at 92 GPa and at a temperature of 2500 K. Its crystal structure was determined by in situ ... -
Towards joint in situ determination of pressure and temperature in the large volume press exclusively from X‐ray diffraction
(Journal of Synchrotron Radiation, 2023-06-21)Since high‐pressure devices have been used at synchrotron facilities, accurate determination of pressure and temperature in the sample has been a crucial objective, particularly for experiments that simulate the Earth's ...