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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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Mccammon, Catherine
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (10/10 displayed)
- 2023Ultrahigh‐Pressure Acoustic Velocities of Aluminous Silicate Glass up to 155 GPa With Implications for the Structure and Dynamics of the Deep Terrestrial Magma Oceancitations
- 2023Crystal chemistry and compressibility of Fe0.5Mg0.5Al0.5Si0.5O3 and FeMg0.5Si0.5O3 silicate perovskites at pressures up to 95 GPacitations
- 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
- 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
- 2017Effect of composition on compressibility of skiagite-Fe-majorite garnetcitations
- 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
- 2010High-temperature Mossbauer spectroscopy: A probe for the relaxation time of Fe species in silicate melts and glassescitations
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article
Ultrahigh‐Pressure Acoustic Velocities of Aluminous Silicate Glass up to 155 GPa With Implications for the Structure and Dynamics of the Deep Terrestrial Magma Ocean
Abstract
<jats:title>Abstract</jats:title><jats:p>We have carried out in situ high‐pressure acoustic velocity measurements of (Fe<jats:sup>2+</jats:sup>, Al)‐bearing MgSiO<jats:sub>3</jats:sub> glass up to pressures of 155 GPa, which confirmed a distinct pressure‐induced trend change in the transverse acoustic velocity (<jats:italic>V</jats:italic><jats:sub><jats:italic>S</jats:italic></jats:sub>) profile around 98 GPa, likely caused by the Si‐O coordination number (CN) change from 6 to 6<jats:sup>+</jats:sup>. Although it has been reported that the substitution of Fe<jats:sup>2+</jats:sup> in MgSiO<jats:sub>3</jats:sub> glass induces almost linear velocity reduction up to ∼160 GPa, we revealed that the <jats:italic>V</jats:italic><jats:sub><jats:italic>S</jats:italic></jats:sub> profile of (Fe<jats:sup>2+</jats:sup>, Al)‐bearing MgSiO<jats:sub>3</jats:sub> becomes anomalously steeper above ∼100 GPa and eventually came to be equivalent to MgSiO<jats:sub>3</jats:sub> glass above ∼125 GPa. This implies the incorporation of Al into Fe‐bearing MgSiO<jats:sub>3</jats:sub> glass significantly facilitates making it far elastically stiffer and thus the densification under pressures well within the Earth's lower mantle. Our results indicate the possible presence of stiff and highly dense silicate melts in deep MOs in the rocky terrestrial planets.</jats:p>