Ilya Kupenko
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View article: Depth-dependent anisotropy in the Earth’s inner core linked to chemical stratification
Depth-dependent anisotropy in the Earth’s inner core linked to chemical stratification Open
Seismic anisotropy in the Earth’s inner core (IC), including the heterogeneous, depth-dependent anisotropy structure, is a well-documented yet poorly understood feature plausibly related to the alignment of iron alloy crystals. Here, we re…
View article: All-optical measurements of MORB-glass density at high pressure hint at a stiffness-composition relation in silicate glasses
All-optical measurements of MORB-glass density at high pressure hint at a stiffness-composition relation in silicate glasses Open
International audience
View article: The structure and stability of Fe4+xS3 and its potential to form a Martian inner core
The structure and stability of Fe4+xS3 and its potential to form a Martian inner core Open
Seismic, geodetic and cosmochemical evidence point to Mars having a sulfur-rich liquid core. Due to the similarity between estimates of the core’s sulfur content and the iron - iron sulfide eutectic composition at core conditions, it has b…
View article: Origin of the depth-dependent anisotropy in the Earth’s inner core
Origin of the depth-dependent anisotropy in the Earth’s inner core Open
The understanding of the origin of seismic anisotropy in the Earth’s inner core (IC) remains a subject of debate and requires examining the deformation behavior of potential core materials. In this research, we investigated the effect of s…
View article: Monoclinic distortion and magnetic transitions in FeO under pressure and temperature
Monoclinic distortion and magnetic transitions in FeO under pressure and temperature Open
Fe 1- x O, although chemically simple, possesses a complex structural and magnetic phase diagram. The crystal structures of Fe 1- x O and its magnetic properties at extreme conditions are still a matter of debate. Here, we performed a syst…
View article: Monoclinic distortion and magnetic transitions in FeO under pressure and temperature
Monoclinic distortion and magnetic transitions in FeO under pressure and temperature Open
Fe1-xO, although chemically simple, possesses a complex structural and magnetic phase diagram. The crystal structures of Fe1-xO and its magnetic properties at high-pressure and high-temperature conditions are still a matter of debate. In t…
View article: Edge states in 2D A2BX4 lead halide perovskites enabled by local structural reorganization
Edge states in 2D A2BX4 lead halide perovskites enabled by local structural reorganization Open
The edge states (ES) inherent in 2D hybrid lead halide perovskites (LHPs) play host to free carriers of low energy and extended lifetimes which is distinct from the tightly bound excitons found in the interior states (IS). Though the ES of…
View article: Pressure dependence of intra- and interlayer excitons in 2H-MoS$_2$ bilayers
Pressure dependence of intra- and interlayer excitons in 2H-MoS$_2$ bilayers Open
The optical and electronic properties of multilayer transition metal dichalcogenides differ significantly from their monolayer counterparts due to interlayer interactions. The separation of individual layers can be tuned in a controlled wa…
View article: Strength and anisotropy of hexagonal Fe-Si-C alloy in planetary cores
Strength and anisotropy of hexagonal Fe-Si-C alloy in planetary cores Open
The observed density of planetary cores is lower than in pure iron-nickel alloy at corresponding conditions. Therefore, the cores of terrestrial planets should be composed of iron-nickel alloyed with some lighter elements. These elements s…
View article: Strength and seismic anisotropy of textured FeSi at planetary core conditions
Strength and seismic anisotropy of textured FeSi at planetary core conditions Open
Elastic anisotropy of iron-bearing alloys and compounds can lead to a variation of seismic velocities along different directions in planetary cores. Understanding the deformation properties of candidate core-forming materials is thus neces…
View article: Symmetry protected 1D chains in mixed-valence iron oxides
Symmetry protected 1D chains in mixed-valence iron oxides Open
During the last decade of high-pressure research a whole new series of iron oxides was discovered, like Fe$_4$O$_5$, Fe$_5$O$_6$, Fe$_7$O$_9$ etc., featuring closely related structures with arrays of one-dimensional (1D) chains of trigonal…
View article: CSD 1902731: Experimental Crystal Structure Determination
CSD 1902731: Experimental Crystal Structure Determination Open
An entry from the Inorganic Crystal Structure Database, the world’s repository for inorganic crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely availabl…
View article: CSD 1902730: Experimental Crystal Structure Determination
CSD 1902730: Experimental Crystal Structure Determination Open
An entry from the Inorganic Crystal Structure Database, the world’s repository for inorganic crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely availabl…
View article: CSD 1902737: Experimental Crystal Structure Determination
CSD 1902737: Experimental Crystal Structure Determination Open
An entry from the Inorganic Crystal Structure Database, the world’s repository for inorganic crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely availabl…
View article: CSD 1902733: Experimental Crystal Structure Determination
CSD 1902733: Experimental Crystal Structure Determination Open
An entry from the Inorganic Crystal Structure Database, the world’s repository for inorganic crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely availabl…
View article: CSD 1902729: Experimental Crystal Structure Determination
CSD 1902729: Experimental Crystal Structure Determination Open
An entry from the Inorganic Crystal Structure Database, the world’s repository for inorganic crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely availabl…
View article: Strength and seismic anisotropy of textured FeSi at planetary core conditions
Strength and seismic anisotropy of textured FeSi at planetary core conditions Open
Data of the radial diffraction experiment at 300 K and 1100 K
View article: Strength and seismic anisotropy of textured FeSi at planetary core conditions
Strength and seismic anisotropy of textured FeSi at planetary core conditions Open
Data of the radial diffraction experiment at 300 K and 1100 K
View article: Discovery of Elgoresyite, (Mg,Fe)<sub>5</sub>Si<sub>2</sub>O<sub>9</sub>: Implications for Novel Iron-Magnesium Silicates in Rocky Planetary Interiors
Discovery of Elgoresyite, (Mg,Fe)<sub>5</sub>Si<sub>2</sub>O<sub>9</sub>: Implications for Novel Iron-Magnesium Silicates in Rocky Planetary Interiors Open
International audience
View article: Sound Velocities in FeSi at Lower Mantle Conditions and the Origin of Ultralow‐Velocity Zones
Sound Velocities in FeSi at Lower Mantle Conditions and the Origin of Ultralow‐Velocity Zones Open
The origin of ultralow‐velocity zones (ULVZs) remains an open question despite recent advances in mineral physics and seismology. Here, we examine the hypothesis that FeSi formed from core‐mantle chemical reactions is a plausible source of…
View article: Novel Fe hydrides and magnetism in the Fe-H system at high pressures
Novel Fe hydrides and magnetism in the Fe-H system at high pressures Open
The structure and properties of metal-hydrides at extreme conditions is key to the understanding of hydrogen-storage technologies, high-temperature superconductivity, and the dynamics of planetary cores. Here we investigate the phase relat…
View article: CSD 1882392: Experimental Crystal Structure Determination
CSD 1882392: Experimental Crystal Structure Determination Open
An entry from the Inorganic Crystal Structure Database, the world’s repository for inorganic crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely availabl…
View article: CSD 1907209: Experimental Crystal Structure Determination
CSD 1907209: Experimental Crystal Structure Determination Open
An entry from the Inorganic Crystal Structure Database, the world’s repository for inorganic crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely availabl…
View article: CSD 1986018: Experimental Crystal Structure Determination
CSD 1986018: Experimental Crystal Structure Determination Open
An entry from the Inorganic Crystal Structure Database, the world’s repository for inorganic crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely availabl…
View article: CSD 1907212: Experimental Crystal Structure Determination
CSD 1907212: Experimental Crystal Structure Determination Open
An entry from the Inorganic Crystal Structure Database, the world’s repository for inorganic crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely availabl…
View article: A portable on-axis laser-heating system for near-90° X-ray spectroscopy: application to ferropericlase and iron silicide
A portable on-axis laser-heating system for near-90° X-ray spectroscopy: application to ferropericlase and iron silicide Open
A portable IR fiber laser-heating system, optimized for X-ray emission spectroscopy (XES) and nuclear inelastic scattering (NIS) spectroscopy with signal collection through the radial opening of diamond anvil cells near 90°with respect to …