Regensburg 2022 – wissenschaftliches Programm

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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur

KFM 25: Poster

KFM 25.13: Poster

Donnerstag, 8. September 2022, 15:00–18:00, P2

X-ray emission setup to study electronic structure of iron bearing compounds in situ at high pressure and high temperature — •Nicola Thiering¹, Christian Albers¹, Robin Sakrowski¹, Max Wilke², Johannes Kaa^1,4, Hlynur Gretarsson^3,5, Martin Sundermann^3,5, Metin Tolan^1,6, and Christian Sternemann¹ — ¹Fakultät Physik/DELTA, Technische Universität Dortmund, Dortmund, Germany — ²Institut für Geowissenschaften, Universität Potsdam, Potsdam, Germany — ³Deutsches-Elektronen-Synchrotron DESY, Hamburg, Germany — ⁴European XFEL, Schenefeld, Germany — ⁵Max Planck Institute for Chemical Physics of Solids, Dresden, Germany — ⁶Universität Göttingen, Göttingen, Germany

The determination of iron-bearing compounds’ electronic structure under high pressure and temperature (HPHT) conditions is pivotal to understand the chemistry, physics and dynamics of the Earth’s interior [1]. We present a setup for investigating the electronic structure of such compounds in situ at HPHT up to 80 GPa and 3000 K, achieved by using diamond anvils cells in combination with a double-sided laser heating setup [2,3] using (resonant) X-ray emission spectroscopy ((R)XES) and show results for α-Fe₂O₃ and FeCO₃. (R)XES spectra were acquired utilizing a wavelength-dispersive von Hámos spectrometer in combination with a Pilatus 100K area detector [4] at PETRA III. [1] B. Orcutt et al. Deep Carbon (2019) [2] C. Albers et al. PRB 105 085155 (2022) [3] G. Spiekermann et al. JSR, 27, 414 (2020) [4] C. Weis et al. JAAS 34, 384 (2019)