Combining X-ray Kβ 1,3 , valence-to-core, and X-ray Raman spectroscopy for studying Earth materials at high pressure and temperature: The case of siderite

Christopher Weis, Georg Spiekermann, Christian Sternemann, Manuel Harder, G. Vankó, Valerio Cerantola, Christoph J. Sahle, Yury Forov, Robin Sakrowski, Ilya Kupenko, Sylvain Petitgirard, Hasan Yavaş, Christian Bressler, Wojciech Gawelda, Metin Tolan, Max Wilke

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5 Citations (Scopus)

Abstract

X-ray emission and X-ray Raman scattering spectroscopy are powerful tools to investigate the local electronic and atomic structure of high and low Z elements in situ. Notably, these methods can be applied for in situ spectroscopy at high pressure and high temperature using resistively or laser-heated diamond anvil cells in order to achieve thermodynamic conditions which appear in the Earth's interior. We present a setup for combined X-ray emission and X-ray Raman scattering studies at beamline P01 of PETRA III using a portable wavelength-dispersive von Hamos spectrometer together with the permanently installed multiple-analyzer Johann-type spectrometer. The capabilities of this setup are exemplified by investigating the iron spin crossover of siderite FeCO 3 up to 49.3 GPa by measuring the Fe M 2,3 -edge and the Fe Kβ 1,3 emission line simultaneously. With this setup, the Fe valence-to-core emission can be detected together with the Kβ 1,3 emission line providing complementary information on the sample's electronic structure. By implementing a laser-heating device, we demonstrate the strength of using a von Hamos type spectrometer for spin state mapping at extreme conditions. Finally, we give different examples of low Z elements' absorption edges relevant for application in geoscience that are accessible with the Johann-type XRS spectrometer. With this setup new insights into the spin transition and compression mechanisms of Earth's mantle materials can be obtained of importance for comprehension of the macroscopic physical and chemical properties of the Earth's interior.

Original languageEnglish
Pages (from-to)384-393
Number of pages10
JournalJournal of analytical atomic spectrometry
Volume34
Issue number2
DOIs
Publication statusPublished - Feb 1 2019

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ASJC Scopus subject areas

  • Analytical Chemistry
  • Spectroscopy

Cite this

Weis, C., Spiekermann, G., Sternemann, C., Harder, M., Vankó, G., Cerantola, V., Sahle, C. J., Forov, Y., Sakrowski, R., Kupenko, I., Petitgirard, S., Yavaş, H., Bressler, C., Gawelda, W., Tolan, M., & Wilke, M. (2019). Combining X-ray Kβ 1,3 , valence-to-core, and X-ray Raman spectroscopy for studying Earth materials at high pressure and temperature: The case of siderite. Journal of analytical atomic spectrometry, 34(2), 384-393. https://doi.org/10.1039/c8ja00247a