| People | Locations | Statistics |
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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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Salmon, Philip Stephen
University of Bath
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (17/17 displayed)
- 2024Pressure dependent structure of amorphous magnesium aluminosilicatescitations
- 2023Mapping the structural trends in zinc aluminosilicate glassescitations
- 2022Structure and related properties of amorphous magnesium aluminosilicatescitations
- 2021Structure of crystalline and amorphous materials in the NASICON system Na1+xAlxGe2- x(PO4)3citations
- 2019Ordering on different length scales in liquid and amorphous materialscitations
- 2019Structure of the intermediate phase glasses GeSe3 and GeSe4citations
- 2017Topological Ordering and Viscosity in the Glass-Forming Ge-Se System: The Search for a Structural or Dynamical Signature of the Intermediate Phasecitations
- 2017Structure of rare-earth chalcogenide glasses by neutron and x-ray diffractioncitations
- 2016Pressure-driven transformation of the ordering in amorphous network-forming materialscitations
- 2015Networks under pressurecitations
- 2015Pressure-dependent structure of the null-scattering alloy Ti0.676Zr0.324citations
- 2013Fragile glass - formers reveal their structural secrets
- 2013Identifying and characterising the different structural length scales in liquids and glasses: an experimental approachcitations
- 2011Structure of eutectic liquids in the Au-Si, Au-Ge, and Ag-Ge binary systems by neutron diffractioncitations
- 2010Structure of liquid and glassy ZnCl2citations
- 2009Atomic structure of the two intermediate phase glasses SiSe4 and GeSe4citations
- 2003Identification of the relative distribution of rare-earth ions in phosphate glassescitations
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article
Pressure dependent structure of amorphous magnesium aluminosilicates
Abstract
<p>The effect of replacing magnesia by alumina on the pressure-dependent structure of amorphous enstatite was investigated by applying in situ high-pressure neutron diffraction with magnesium isotope substitution to glassy (MgO)0.375(Al2O3)0.125(SiO2)0.5. The replacement leads to a factor of 2.4 increase in the rate-of-change of the Mg-O coordination number with pressure, which increases from 4.76(4) at ambient pressure to 6.51(4) at 8.2 GPa, and accompanies a larger probability of magnesium finding bridging oxygen atoms as nearest-neighbors. The Al-O coordination number increases from 4.17(7) to 5.24(8) over the same pressure interval at a rate that increases when the pressure is above ∼3.5 GPa. On recovering the glass to ambient conditions, the Mg-O and Al-O coordination numbers reduce to 5.32(4) and 4.42(6), respectively. The Al-O value is in accordance with the results from solid-state 27Al nuclear magnetic resonance spectroscopy, which show the presence of six-coordinated aluminum species that are absent in the uncompressed material. These findings explain the appearance of distinct pressure-dependent structural transformation regimes in the preparation of permanently densified magnesium aluminosilicate glasses. They also indicate an anomalous minimum in the pressure dependence of the bulk modulus with an onset that suggests a pressure-dependent threshold for transitioning between scratch-resistant and crack-resistant material properties.</p>