Structural and electron spin state changes in an x-ray heated iron carbonate system at the Earth's lower mantle pressures
The determination of the spin state of iron-bearing compounds at high pressure and temperature is crucial for our understanding of chemical and physical properties of the deep Earth. Studies on the relationship between the coordination of iron and its electronic spin structure in iron-bearing oxides...
| Autores principales: | , , , , , , , , , , , , , , , , , , , , , |
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| Formato: | Artículo |
| Lenguaje: | English |
| Publicado: |
American Physical Society
2022-07-01
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| Colección: | Physical Review Research |
| Acceso en línea: | http://doi.org/10.1103/PhysRevResearch.4.033042 |
| _version_ | 1827285437714006016 |
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| author | Johannes M. Kaa Christian Sternemann Karen Appel Valerio Cerantola Thomas R. Preston Christian Albers Mirko Elbers Lélia Libon Mikako Makita Alexander Pelka Sylvain Petitgirard Christian Plückthun Vladimir Roddatis Christoph J. Sahle Georg Spiekermann Christian Schmidt Anja Schreiber Robin Sakrowski Metin Tolan Max Wilke Ulf Zastrau Zuzana Konôpková |
| author_facet | Johannes M. Kaa Christian Sternemann Karen Appel Valerio Cerantola Thomas R. Preston Christian Albers Mirko Elbers Lélia Libon Mikako Makita Alexander Pelka Sylvain Petitgirard Christian Plückthun Vladimir Roddatis Christoph J. Sahle Georg Spiekermann Christian Schmidt Anja Schreiber Robin Sakrowski Metin Tolan Max Wilke Ulf Zastrau Zuzana Konôpková |
| author_sort | Johannes M. Kaa |
| collection | DOAJ |
| description | The determination of the spin state of iron-bearing compounds at high pressure and temperature is crucial for our understanding of chemical and physical properties of the deep Earth. Studies on the relationship between the coordination of iron and its electronic spin structure in iron-bearing oxides, silicates, carbonates, iron alloys, and other minerals found in the Earth's mantle and core are scarce because of the technical challenges to simultaneously probe the sample at high pressures and temperatures. We used the unique properties of a pulsed and highly brilliant x-ray free electron laser (XFEL) beam at the High Energy Density (HED) instrument of the European XFEL to x-ray heat and probe samples contained in a diamond anvil cell. We heated and probed with the same x-ray pulse train and simultaneously measured x-ray emission and x-ray diffraction of an FeCO_{3} sample at a pressure of 51 GPa with up to melting temperatures. We collected spin state sensitive Fe Kβ_{1,3} fluorescence spectra and detected the sample's structural changes via diffraction, observing the inverse volume collapse across the spin transition. During x-ray heating, the carbonate transforms into orthorhombic Fe_{4}C_{3}O_{12} and iron oxides. Incipient melting was also observed. This approach to collect information about the electronic state and structural changes from samples contained in a diamond anvil cell at melting temperatures and above will considerably improve our understanding of the structure and dynamics of planetary and exoplanetary interiors. |
| first_indexed | 2024-04-24T10:14:41Z |
| format | Article |
| id | doaj.art-124778482b2146ca923747c86b8d4890 |
| institution | Directory Open Access Journal |
| issn | 2643-1564 |
| language | English |
| last_indexed | 2024-04-24T10:14:41Z |
| publishDate | 2022-07-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj.art-124778482b2146ca923747c86b8d48902024-04-12T17:22:50ZengAmerican Physical SocietyPhysical Review Research2643-15642022-07-014303304210.1103/PhysRevResearch.4.033042Structural and electron spin state changes in an x-ray heated iron carbonate system at the Earth's lower mantle pressuresJohannes M. KaaChristian SternemannKaren AppelValerio CerantolaThomas R. PrestonChristian AlbersMirko ElbersLélia LibonMikako MakitaAlexander PelkaSylvain PetitgirardChristian PlückthunVladimir RoddatisChristoph J. SahleGeorg SpiekermannChristian SchmidtAnja SchreiberRobin SakrowskiMetin TolanMax WilkeUlf ZastrauZuzana KonôpkováThe determination of the spin state of iron-bearing compounds at high pressure and temperature is crucial for our understanding of chemical and physical properties of the deep Earth. Studies on the relationship between the coordination of iron and its electronic spin structure in iron-bearing oxides, silicates, carbonates, iron alloys, and other minerals found in the Earth's mantle and core are scarce because of the technical challenges to simultaneously probe the sample at high pressures and temperatures. We used the unique properties of a pulsed and highly brilliant x-ray free electron laser (XFEL) beam at the High Energy Density (HED) instrument of the European XFEL to x-ray heat and probe samples contained in a diamond anvil cell. We heated and probed with the same x-ray pulse train and simultaneously measured x-ray emission and x-ray diffraction of an FeCO_{3} sample at a pressure of 51 GPa with up to melting temperatures. We collected spin state sensitive Fe Kβ_{1,3} fluorescence spectra and detected the sample's structural changes via diffraction, observing the inverse volume collapse across the spin transition. During x-ray heating, the carbonate transforms into orthorhombic Fe_{4}C_{3}O_{12} and iron oxides. Incipient melting was also observed. This approach to collect information about the electronic state and structural changes from samples contained in a diamond anvil cell at melting temperatures and above will considerably improve our understanding of the structure and dynamics of planetary and exoplanetary interiors.http://doi.org/10.1103/PhysRevResearch.4.033042 |
| spellingShingle | Johannes M. Kaa Christian Sternemann Karen Appel Valerio Cerantola Thomas R. Preston Christian Albers Mirko Elbers Lélia Libon Mikako Makita Alexander Pelka Sylvain Petitgirard Christian Plückthun Vladimir Roddatis Christoph J. Sahle Georg Spiekermann Christian Schmidt Anja Schreiber Robin Sakrowski Metin Tolan Max Wilke Ulf Zastrau Zuzana Konôpková Structural and electron spin state changes in an x-ray heated iron carbonate system at the Earth's lower mantle pressures Physical Review Research |
| title | Structural and electron spin state changes in an x-ray heated iron carbonate system at the Earth's lower mantle pressures |
| title_full | Structural and electron spin state changes in an x-ray heated iron carbonate system at the Earth's lower mantle pressures |
| title_fullStr | Structural and electron spin state changes in an x-ray heated iron carbonate system at the Earth's lower mantle pressures |
| title_full_unstemmed | Structural and electron spin state changes in an x-ray heated iron carbonate system at the Earth's lower mantle pressures |
| title_short | Structural and electron spin state changes in an x-ray heated iron carbonate system at the Earth's lower mantle pressures |
| title_sort | structural and electron spin state changes in an x ray heated iron carbonate system at the earth s lower mantle pressures |
| url | http://doi.org/10.1103/PhysRevResearch.4.033042 |
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