A. Trapananti

Università di Camerino

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Andrea Di Cicco

Università di Camerino

Marco Minicucci

Università di Camerino

Giuliana Aquilanti

Elettra-Sincrotrone Trieste S.C.p.A.

Tetsuo Irifune

Ehime University

Emin Mijit

European Synchrotron Radiation Facility

Lucie Nataf

Synchrotron soleil

F. Baudelet

Synchrotron soleil

S. Pascarelli

European X-Ray Free-Electron Laser

Christian Koeberl

University of Vienna

Gabriele Giuli

Università di Camerino

Cooperative Institutions

Centre National de la Recherche Scientifique

Lawrence Livermore National Laboratory

Sorbonne Université

European X-Ray Free-Electron Laser

European Synchrotron Radiation Facility

University of Edinburgh

SLAC National Accelerator Laboratory

Carnegie Institution for Science

Los Alamos National Laboratory

Università di Camerino

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Structural and electronic transformations of GeSe ₂ glass under high pressures studied by X-ray absorption spectroscopy

Proceedings of the National Academy of Sciences (2024)

Emin Mijit Murat Durandurdu João Elias F. S. Rodrigues A. Trapananti S. J. Rezvani

Pressure-induced transformations in an archetypal chalcogenide glass (GeSe

X-ray absorption spectroscopy

Coordination number

XANES

Chalcogen

Chalcogenide glass

Absorption edge

10.1073/pnas.2318978121

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Citations (2)

Local Structure of Ga _85:8 In _14:2 Eutectic Alloy and Its Pressure–Temperature Melting Line

physica status solidi (RRL) - Rapid Research Letters (2021)

Emin Mijit A. Trapananti Lucie Nataf F. Baudelet Toru Shinmei

The structure of the eutectic liquid alloy is investigated both under ambient conditions and at high pressure/high temperature using X‐ray absorption spectroscopy (XAS) and X‐ray diffraction (XRD) techniques. The local structure of the liquid alloy at ambient conditions is analyzed using double‐edge refinements of the XAS data. Solid–liquid phase transitions under high‐pressure and high‐temperature conditions are monitored by combined XAS and XRD measurements along several quasi‐isobaric heating runs, allowing to draw a melting line up to 10 GPa. The established melting line is found to be slightly below the one of pure gallium (Ga) and to follow its trend as expected from the eutectic nature of the compound. A series of Ga K ‐edge X‐ray absorption fine structure (XAFS) spectra measured at different pressures indicates the absence of large structural modifications at local Ga sites in the liquid within the investigated pressure and temperature range.

X-ray absorption spectroscopy

Ambient pressure

Isobaric process

Atmospheric temperature range

10.1002/pssr.202100423

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Citations (1)

Compression of liquid Ni and Co under extreme conditions explored by x-ray absorption spectroscopy

Physical review. B./Physical review. B (2019)

Silvia Boccato R. Torchio P. D’Angelo A. Trapananti I. Kantor

The compression of liquid nickel and cobalt has been investigated up to 102 and 83 GPa, respectively, by x-ray absorption spectroscopy at the Ni and Co $K$ edges, using laser-heated diamond anvil cell. A shortening of about 8%--10% of the metal bond distances is observed in the pressure range considered and the experimental results are confirmed by theoretical calculations. Ab initio quantum molecular dynamics calculations have been performed, providing a model pair distribution function for cobalt, used as a starting model in the extended x-ray absorption fine structure analysis. The specific volume of the liquid has also been estimated and compared to calculations in the literature. This work sets the basis for x-ray absorption spectroscopy studies of liquid metals under extreme conditions with potentially important implications for the understanding of Earth and planetary interiors.

Diamond anvil cell

X-ray absorption spectroscopy

10.1103/physrevb.100.180101

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Citations (10)

Iron Redox Variations in Australasian Muong Nong-Type Tektites

Meteoritics and Planetary Science Supplement (2013)

Gabriele Giuli Maria Rita Cicconi A. Trapananti S. G. Eeckhout Giovanni Pratesi

Source

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Citations (0)

Investigation of undercooled liquid metals using XAFS, temperature scans and diffraction

Journal of Synchrotron Radiation (2001)

A. Filipponi Andrea Di Cicco Simone De Panfilis A. Trapananti J. P. Itié

Novel techniques and the experimental station for experiments on condensed matter under extreme conditions that have been developed at the BM29 beamline of the European Synchrotron Radiation Facility (ESRF) are described. The experimental setup includes facilities to collect high-quality extended X-ray absorption fine structure (EXAFS) spectra, to perform controlled temperature scans while monitoring the sample absorption for the direct detection of phase transitions, and to collect high-resolution energy-scanning X-ray diffraction (ESXD) data, with recent enhancements through the installation of a two-channel collimator detector system. Facilities for X-ray absorption temperature scans, introduced five years ago, are now exploited for a wide variety of purposes. A method for the measurement of the nucleation rate in undercooled liquids has been proposed recently. All these advances in the experimental setup and techniques, combined with a simple but rigorous X-ray absorption fine structure (XAFS) data analysis scheme for disordered matter, have contributed to make feasible challenging experiments on undercooled liquid matter that were not even conceivable only a few years ago. An example of the application of these methods to undercooled liquid indium (In) is presented.

10.1107/s0909049500019300

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Citations (7)

Cadmium under High Pressure and High Temperature Conditions

Physica Scripta (2005)

Marco Minicucci A. Trapananti Andrea Di Cicco Simone De Panfilis Giuliana Aquilanti

In this work liquid and solid cadmium has been investigated in a wide pressure and temperature range in order to provide new information about structure and transitions occurring in this metal. X-ray absorption, single-energy temperature scans and energy scanning x-ray diffraction data were collected in a 25–600 °C temperature and 0–5.8 GPa pressure range, exploiting the setup available at the ESRF-BM29 beam-line. Clear changes in the absorption spectra (measured at cadmium K-edge) and in the diffraction patterns, associated with the solid-liquid transition, allowed us to obtain an accurate measurement of the melting curve as a function of pressure. The structural data are compared with the few available calculations and x-ray scattering data on molten Cd at ambient pressure. High pressure data on liquid cadmium are reported for the first time and are essential to shed some light on the changes of the local structure induced by pressure.

Absorption edge

Cadmium oxide

10.1238/physica.topical.115a01056

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Citations (10)

Shock compression experiments using the DiPOLE 100-X laser on the high energy density instrument at the European x-ray free electron laser: Quantitative structural analysis of liquid Sn

Journal of Applied Physics (2024)

M. G. Gorman D. McGonegle R. F. Smith Saransh Singh Timothy A. Jenkins

X-ray free electron laser (XFEL) sources coupled to high-power laser systems offer an avenue to study the structural dynamics of materials at extreme pressures and temperatures. The recent commissioning of the DiPOLE 100-X laser on the high energy density (HED) instrument at the European XFEL represents the state-of-the-art in combining x-ray diffraction with laser compression, allowing for compressed materials to be probed in unprecedented detail. Here, we report quantitative structural measurements of molten Sn compressed to 85(5) GPa and ∼3500 K. The capabilities of the HED instrument enable liquid density measurements with an uncertainty of ∼1% at conditions which are extremely challenging to reach via static compression methods. We discuss best practices for conducting liquid diffraction dynamic compression experiments and the necessary intensity corrections which allow for accurate quantitative analysis. We also provide a polyimide ablation pressure vs input laser energy for the DiPOLE 100-X drive laser which will serve future users of the HED instrument.

Warm dense matter

Laser Ablation

State of matter

10.1063/5.0201702

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Citations (4)

Electronic topological transition in zinc under pressure: An x-ray absorption spectroscopy study

Physical Review B (2007)

Giuliana Aquilanti A. Trapananti Marco Minicucci Fabiola Liscio A. Twaróg

Zinc metal has been studied at high pressure using x-ray absorption spectroscopy. In order to investigate the role of the different degrees of hydrostaticity on the occurrence of structural anomalies following the electronic topological transition, two pressure transmitting media have been used. Results show that the electronic topological transition, if it exists, does not induce an anomaly in the local environment of compressed Zn as a function of hydrostatic pressure and any anomaly must be related to a loss of hydrostaticity of the pressure transmitting medium. The near-edge structures of the spectra, sensitive to variations in the electronic density of states above the Fermi level, do not show any evidence of electronic transition whatever pressure transmitting medium is used.

Hydrostatic pressure

Anomaly (physics)

Atomic electron transition

X-ray absorption spectroscopy

10.1103/physrevb.76.144102

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Citations (13)

The amorphous Zn biomineralization at Naracauli stream, Sardinia: electron microscopy and X-ray absorption spectroscopy

Environmental Science and Pollution Research (2013)

Daniela Medas Pierfranco Lattanzi Francesca Podda Carlo Meneghini A. Trapananti

XANES

X-ray absorption spectroscopy

10.1007/s11356-013-1886-4

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Citations (32)

High-pressure phase of GaP: Structure and chemical ordering

Physical Review B (2007)

Giuliana Aquilanti H. Libotte Wilson A. Crichton S. Pascarelli A. Trapananti

The present paper concerns a combined x-ray diffraction and absorption study of gallium phosphide (GaP) at high pressure up to $39\phantom{\rule{0.3em}{0ex}}\mathrm{GPa}$. The aim of this study is twofold: To clarify the nature of the high pressure phase using x-ray diffraction and to determine the degree and the evolution of the short range chemical order using x-ray absorption. The analysis of x-ray diffraction shows that GaP transforms to a Cmcm structure and the absence of the ``difference reflections'' indicates that the Cmcm structure lacks long-range chemical order. In this system, the EXAFS is compatible with the hypothesis of a chemically ordered Cmcm local environment. The comparison between the XANES region of the spectra and multiple scattering calculations confirms this hypothesis, clearly showing that the Cmcm is short-range chemically ordered. The local environment of Ga is given by $6\phantom{\rule{0.3em}{0ex}}\mathrm{P}$ atoms and short-range Ga-Ga interactions are not likely to occur in this system, at least up to $39\phantom{\rule{0.3em}{0ex}}\mathrm{GPa}$. This result shows that even in a compound with a relatively low ionicity of the bonds, this parameter dictates the short-range interactions up to very high pressures.

XANES

Short range order

10.1103/physrevb.76.064103

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Citations (18)