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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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Kantor, Innokenty
Superconducting and other Innovative Materials and Devices Institute
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (19/19 displayed)
- 2024Weyl semimetallic phase in high pressure CrSb 2 and structural compression studies of its high pressure polymorphs
- 2024Oxygen-defective electrostrictors for soft electromechanicscitations
- 2024Oxygen-defective electrostrictors for soft electromechanicscitations
- 2024Weyl semimetallic phase in high pressure CrSb$_2$ and structural compression studies of its high pressure polymorphs
- 2024Weyl semimetallic phase in high pressure CrSb2 and structural compression studies of its high pressure polymorphs
- 2023In-Situ X-ray Diffraction Analysis of Metastable Austenite Containing Steels Under Mechanical Loading at a Wide Strain Rate Rangecitations
- 2023Sintering in seconds, elucidated by millisecond in situ diffractioncitations
- 2021Size-induced amorphous structure in tungsten oxide nanoparticlescitations
- 2019Electronic origins of the giant volume collapse in the pyrite mineral MnS 2citations
- 2019Experimental investigation of FeCO3 (siderite) stability in Earth's lower mantle using XANES spectroscopycitations
- 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
- 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
- 2018Solving Controversies on the Iron Phase Diagram Under High Pressurecitations
- 2018Electronic origins of the giant volume collapse in the pyrite mineral <math altimg='si0047.gif' overflow='scroll'><msub><mrow><mi>MnS</mi></mrow><mrow><mn>2</mn></mrow></msub></math>citations
- 2016Universal amorphous-amorphous transition in Ge x Se 100−x glasses under pressurecitations
- 2016Thermal decomposition of ammonium hexachloroosmatecitations
- 2016Universal amorphous-amorphous transition in GexSe100−x glasses under pressurecitations
- 2016Universal amorphous-amorphous transition in Ge x Se 100-x glasses under pressurecitations
- 2011Pressure-induced structural phase transition of the iron end-member of ringwoodite (gamma-Fe(2)SiO(4)) investigated by X-ray diffraction and Mossbauer spectroscopycitations
Places of action
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article
Electronic origins of the giant volume collapse in the pyrite mineral <math altimg='si0047.gif' overflow='scroll'><msub><mrow><mi>MnS</mi></mrow><mrow><mn>2</mn></mrow></msub></math>
Abstract
The pyrite mineral MnS<sub>2</sub> was recently shown to undergo a giant pressure-induced volume collapse at12 GPa, via a disordered intermediate phase. The high pressure arsenopyrite phase is stabilised by metal-metal bonding, a mechanism now shown to be ubiquitous for Mn<sup>2+</sup> chalcogenides. Here we report a spectroscopic investigation of this transition up to pressures of 22 GPa. Using XANES we show that the transition does not involve a change in oxidation state, consistent with the arsenopyrite crystal structure proposed at high pressure. Notably, the XANES spectrum is almost identical in the pressure-induced disordered phase, and after crystallisation induced by laser-heating. The former is therefore a `valence bond glass', and is likely disordered due to kinetic hindrance of the phase transition. We also detect electronic changes in the compressed pyrite phase, and this is con rmed by Raman scattering which shows that the disulphide vibrations in the pyrite phase saturate before the volume collapse. Together with detailed DFT calculations, these results indicate that electronic changes precede valence bond formation between the Mn<sup>2+</sup> cations.