2026-08-07T06:28:55Z
https://icatplus.esrf.fr/oaipmh/request
oai:icatplus.esrf.fr:inv/1057385801
2024-01-25T09:02:59.916Z
4.2
EI
10.15151/ESRF-ES-1057385801
Alexis FORESTIER
Alexis
Forestier
0000-0003-2329-2408
Frederic DATCHI
Frederic
Datchi
Frederic DATCHI
Frederic
Datchi
Alexis FORESTIER
Alexis
Forestier
0000-0003-2329-2408
Mohamed MEZOUAR
Mohamed
Mezouar
0000-0001-5336-544X
Sandra NINET
Sandra
Ninet
0000-0001-8239-4725
Sandra NINET
Sandra
Ninet
0000-0001-8239-4725
Gaston GARBARINO
Gaston
Garbarino
0000-0003-4780-9520
Gunnar WECK
Gunnar
Weck
Gunnar WECK
Gunnar
Weck
Loic TORAILLE
Loic
Toraille
0000-0002-2416-8321
Loic TORAILLE
Loic
Toraille
0000-0002-2416-8321
MAELIE CAUSSE
Maelie
Causse
MAELIE CAUSSE
Maelie
Causse
XRD of water ice above 200 GPa under variable P-T conditions: revealing a structural complexity at planetary interiors pressures.
Example Institute
2026
Data from large facility measurement
2023-02-10T07:00:00Z/2023-02-13T07:00:00Z
2023-02-13T07:00:00Z
I
CC-BY-4.0
This proposal is a continuation of proposal HC-4677 which aimed at measuring the boundary line between bcc insulating and fcc-superionic (fcc-SI) phases of ice. A sample assembly with two boron-doped diamond absorbers has been optimized and it enabled a controlled laser heating of the ice sample up to 200 GPa. A negative slope for the bcc to fcc-SI transition and a metastable quenched fcc-SI phase at ambient temperature have been observed. That hints to the stability of the fcc-SI phase below 1000K by going to 300 GPa. Also, compact phases with greater packing density than bcc should be observed by compressing water ice up to 400 GPa at 300K. We plan to continue the exploration of the detailed structural properties of dense water ice above 200 GPa. These are very challenging measurements of great impact to model planetary interiors of Uranus, Neptune and other ice giant exoplanets.