2026-06-01T09:26:36Z https://icatplus.esrf.fr/oaipmh/request

oai:icatplus.esrf.fr:inv/2097017926 2025-05-09T06:01:41.068Z

4.2 EI 10.15151/ESRF-ES-2097017926 Emanuele COLONNA Emanuele Colonna 0009-0006-8479-3870 Emanuele COLONNA Emanuele Colonna 0009-0006-8479-3870 Ilaria CARLOMAGNO Ilaria Carlomagno 0000-0003-3736-1558 Ilaria CARLOMAGNO Ilaria Carlomagno 0000-0003-3736-1558 Nicolas SEVELIN-RADIGUET Nicolas Sevelin-Radiguet 0000-0002-3360-4252 Jose Luis RODRIGO RAMON Jose Luis Rodrigo Ramon 0009-0004-0485-238X Jose Luis RODRIGO RAMON Jose Luis Rodrigo Ramon 0009-0004-0485-238X Jean-Alexis HERNANDEZ Jean-Alexis Hernandez Raffaella TORCHIO Raffaella Torchio Simone ANZELLINI Simone Anzellini 0000-0003-0091-3902 Simone ANZELLINI Simone Anzellini 0000-0003-0091-3902 Carlo MENEGHINI Carlo Meneghini 0000-0003-4846-8422 Carlo MENEGHINI Carlo Meneghini 0000-0003-4846-8422 Example Institute 2028 Data from large facility measurement 2025-05-01T06:00:00Z/2025-05-09T06:00:00Z 2025-05-09T06:00:00Z I CC-BY-4.0 Iridium belongs to the 5d transition metals and it is the only refractory metal with a face-centred cubic structure. The stability of its fcc structure under extreme conditions of pressure and temperature has been debated for years and so far, only a single HP-HT melting point was experimentally detected. In addition, a new electronic transition called core-level crossing has been predicted for Ir at around 80 GPa at room temperature and could affect its structural properties. We propose to use the new HPLF facility available on the beamline ID24 to perform time-resolved single-pulsed X-ray Absorption Spectroscopy measurements on shock-compressed iridium in order to: (i) characterize the presence of any solid-solid phase transition along the Hugoniot; (ii) investigate the possible occurrence of a CLC transition; (iii) obtain an additional melting points at P and T in excess of 5 Mbar and 14000 K, respectively