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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Chariton, Stella
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (23/23 displayed)
- 2024Structure and titanium distribution of feiite characterized using synchrotron single-crystal X-ray diffraction techniquescitations
- 2023MHz free electron laser x-ray diffraction and modeling of pulsed laser heated diamond anvil cellcitations
- 2023Structure determination of ζ-N2 from single-crystal X-ray diffraction and theoretical suggestion for the formation of amorphous nitrogencitations
- 2022Synthesis of Ultra-Incompressible Carbon Nitrides Featuring Three-Dimensional Frameworks of CN4 Tetrahedra Recoverable at Ambient Conditions
- 2022Fe$^{3+}$-hosting carbon phases in the deep Earthcitations
- 2022High-pressure synthesis of seven lanthanum hydrides with a significant variability of hydrogen contentcitations
- 2022The new Ca(Fe,Al)$_2$O$_4$ phase with calcium ferrite-type structure, a likely carrier of Al in the transition zone and lower mantlecitations
- 2022Synthesis, crystal structure, and properties of stoichiometric hard tungsten tetraboride, WB4citations
- 2021Nitrosonium nitrate (NO+NO3−) structure solution using in situ single-crystal X-ray diffraction in a diamond anvil cellcitations
- 2021Realization of an Ideal Cairo Tessellation in Nickel Diazenide NiN$_2$ : High-Pressure Route to Pentagonal 2D Materialscitations
- 2021Nitrosonium nitrate (NO+NO3-) structure solution using in situ single-crystal X-ray diffraction in a diamond anvil cellcitations
- 2021Nitrosonium nitrate (NO$^+$NO$_3$$^{−}$) structure solution using in situ single-crystal X-ray diffraction in a diamond anvil cellcitations
- 2021High-Pressure Synthesis of Dirac Materials: Layered van der Waals Bonded BeN$_{4}$ Polymorphcitations
- 2021High-Pressure Synthesis of the $β-Zn_{3}N_{2}$ Nitride and the $α-ZnN_{4}$ and $β-ZnN_{4}$ Polynitrogen Compoundscitations
- 2021Synthesis of Ilmenite-type $ε$-Mn$_2$O$_3$ and Its Propertiescitations
- 2021Realization of an Ideal Cairo Tessellation in Nickel Diazenide NiN2: High-Pressure Route to Pentagonal 2D Materialscitations
- 2020Novel sulfur hydrides synthesized at extreme conditionscitations
- 2020High-Pressure Polymeric Nitrogen Allotrope with the Black Phosphorus Structurecitations
- 2020The crystal structures of Fe-bearing MgCO$_{3}$ sp$^{2}$- and sp$^{3}$-carbonates at 98 GPa from single-crystal X-ray diffraction using synchrotron radiationcitations
- 2020The crystal structures of Fe-bearing MgCO3 sp2- and sp3-carbonates at 98 GPa from single-crystal X-ray diffraction using synchrotron radiationcitations
- 2020The crystal structures of Fe-bearing MgCO3 sp(2)- and sp(3)-carbonates at 98 GPa from single-crystal X-ray diffraction using synchrotron radiationcitations
- 2019Comparative study of the influence of pulsed and continuous wave laser heating on the mobilization of carbon and its chemical reaction with iron in a diamond anvil cellcitations
- 2019High-pressure synthesis of ultraincompressible hard rhenium nitride pernitride Re2(N2)(N)2 stable at ambient conditionscitations
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article
Structure and titanium distribution of feiite characterized using synchrotron single-crystal X-ray diffraction techniques
Abstract
<jats:title>Abstract</jats:title><jats:p>A solid solution of the mineral feiite (Fe3TiO5) was recently discovered in a shock-induced melt pocket of the Shergotty martian shergottite. It is particularly interesting for its potential as an indicator of pressure-temperature (P-T) and oxygen fugacity in martian crustal and mantle material. To date, complete crystallographic analysis of feiite has not been conducted, as the mineral was previously analyzed by electron backscatter diffraction on micrometer-size grains (Ma et al. 2021). Here we report a convergent crystal-structure model for feiite based on synchrotron single-crystal X-ray diffraction data collected on three grains of feiite synthesized at 12 GPa and 1200 °C. Feiite adopts the CaFe3O5 structure type (Cmcm, Z = 4), which is composed of two octahedral M1 and M2 sites and one trigonal prismatic M3 site (M = metal) in a ratio of 1:2:1. The three feiite grains with composition Ti0.46–0.60Fe3.54–3.40O5 were best modeled by substituting Ti4+ into only the octahedral M2 site, accounting for 30% of this site. Comparisons of the measured average bond lengths in the coordination polyhedra with the optimized Ti4+–O, Fe2+–O, and Fe3+–O bond lengths suggest that ferrous iron occupies the trigonal M3 site, while iron is mixed valence in the octahedral M1 and M2 sites. The Ti4+ and Fe3+ content constrained by our crystal-chemical analyses suggests that at least ~30% of the available iron must be ferric (i.e., Fe3+/Fetotal = 0.3) for the sample synthesized at 12 GPa and 1200 °C and higher P-T conditions may be needed to form the end-member feiite (Fe32+TiO5).</jats:p>