Browsing by Subject "high pressure"
Now showing items 1-7 of 7
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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 ... -
Non‐Isotropic Contraction and Expansion of Samples in Diamond Anvil Cells: Implications for Thermal Conductivity at the Core‐Mantle Boundary
; (Geophysical Research Letters, 2022-09-30)
The thermal conductivities of mantle and core materials have a major impact on planetary evolution, but their experimental determination requires precise knowledge of sample thickness at high pressure. Despite its importance, ... -
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
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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 ...
