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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur
KFM 5: Poster Session KFM
KFM 5.13: Poster
Tuesday, September 28, 2021, 16:00–17:00, P
X-ray emission scanning imaging setup to study electronic structure of iron bearing compounds in-situ at conditions of the Earth’s mantle — •Christian Albers1, Georg Spiekermann2, Lélia Libon3, Robin Sakrowski1, Max Wilke3, Johannes Kaa4, Nicola Thiering1, Hlynur Gretarrson5, Martin Sundermann5, Metin Tolan1, and Christian Sternemann1 — 1Fakultät Physik/DELTA, Technische Universität Dortmund, Dortmund, Germany — 2Institut für Geochemie und Petrologie, ETH Zürich — 3Institut für Geowissenschaften, Universität Potsdam, Potsdam, Germany — 4HED Group, European XFEL GmbH, Hamburg, Germany — 5Deutschen-Elektronen-Synchrotron DESY, Hamburg, Germany
The determination of the electronic structure in iron-bearing compounds under high pressure and high temperature (HPHT) conditions is of crucial importance for the understanding of the Earth’s interior and planetary matter.
We present a setup to investigate the electronic structure of iron-bearing compounds in-situ at HPHT conditions using X-ray emission spectroscopy (XES) and show first results for tetracarbonate phases emerged from laser heated siderite (FeCO3) at about 80 GPa and 3000 K. Information on the spin state are obtained by in-situ XES of the iron’s Kβ-emission. A dedicated sample preparation together with highly intense synchrotron radiation shortens the duration of the measurements to an extend that in-situ XES, including valence-to-core XES, as well as in-situ spin state imaging becomes feasible.