| 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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Drewitt, James W. E.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (12/12 displayed)
- 2022Boron incorporation in silicate melt
- 2022The glass transition and the non-Arrhenian viscosity of carbonate meltscitations
- 2022The glass transition and the non-Arrhenian viscosity of carbonate meltscitations
- 2022Boron incorporation in silicate melt:pressure-induced coordination changes and implications for B isotope fractionation
- 2021Structure of levitated Si-Ge melts studied by high-energy x-ray diffraction in combination with reverse Monte Carlo simulationscitations
- 2019Configurational constraints on glass formation in the liquid calcium aluminate systemcitations
- 2017Structure of rare-earth chalcogenide glasses by neutron and x-ray diffractioncitations
- 2016Neutron diffraction of calcium aluminosilicate glasses and meltscitations
- 2013Structure of (FexCa1-xO)(y)(SiO2)(1-y) liquids and glasses from high-energy x-ray diffractioncitations
- 2013Fragile glass - formers reveal their structural secrets
- 2013Structure of (FexCa1-xO)(y)(SiO2)(1-y) liquids and glasses from high-energy x-ray diffraction:Implications for the structure of natural basaltic magmascitations
- 2011Application of time resolved x-ray diffraction to study the solidification of glass-forming melts
Places of action
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article
Structure of levitated Si-Ge melts studied by high-energy x-ray diffraction in combination with reverse Monte Carlo simulations
Abstract
The short-range order in liquid Si, Ge and binary Six-Ge1-x alloys (x = 0.25, 0.50, 0.75) was studied by x-ray diffraction and reverse Monte Carlo simulations. Experiments were performed in the normal and supercooled liquid states by using the containerless technique of aerodynamic levitation with CO2 laser heating, enabling deeper supercooling of liquid Si and Si-Ge alloys than that previously reported. The local atomic structure of liquid Si and Ge is found to resemble the β-tin structure. The first coordination numbers of about 6 for all compositions are found to be independent of temperature indicating the supercooled liquids studied retain this high-density liquid (HDL) structure. However, there is evidence of developing local tetrahedral ordering, as manifested by a shoulder on the right side of the first peak in S(Q) which becomes more prominent with increasing supercooling. This result is potentially indicative of a continuous transition from the stable HDL β-tin (high pressure) phase, towards a metastable low-density liquid (LDL) phase, reminiscent of the diamond (ambient pressure) structure.