2026-06-03T21:45:26Z https://icatplus.esrf.fr/oaipmh/request

oai:icatplus.esrf.fr:inv/2043623109 2025-04-14T06:00:25.420Z

4.2 EI 10.15151/ESRF-ES-2043623109 Elena BYKOVA Elena Bykova 0000-0001-8652-024X Valentin KOVALEV Valentin Kovalev 0009-0000-0802-4179 Valentin KOVALEV Valentin Kovalev 0009-0000-0802-4179 Loic JEGOU Loic Jegou Dominik SPAHR Dominik Spahr 0000-0003-0489-5270 Dominik SPAHR Dominik Spahr 0000-0003-0489-5270 Ninel SHARAPOVA Ninel Sharapova Ninel SHARAPOVA Ninel Sharapova Pascal Lennert JURZICK Pascal Lennert Jurzick 0009-0006-3044-3955 Pascal Lennert JURZICK Pascal Lennert Jurzick 0009-0006-3044-3955 Elena BYKOVA Elena Bykova 0000-0001-8652-024X Example Institute 2028 Data from large facility measurement 2025-04-10T06:00:00Z/2025-04-14T06:00:00Z 2025-04-14T06:00:00Z I CC-BY-4.0 The aim of this project is the single crystal structure determination and characterisation of phase transitions of crystalline carbonic acid (H2CO3) at high pressures. Understanding structure-property relations of H2CO3 is of significant interest not only to astrophysics, as H2CO3 is likely to be present on the surface and in the interiors of icy moons (e.g. Ganymede) or ice giants (e.g. Uranus), but also to solid state chemistry, as it is a molecular compound which has led to a number of mutually contradictory studies, e.g. regarding an assumed polymorphism. Up to now no single crystal diffraction data of H2CO3 has been reported and its structure even at low pressures (< 10 GPa) is in dispute. In preliminary experiments, we synthesized H2CO3 crystals from a H2O + CO2 mixture and characterised the product by Raman spectroscopy. We now propose to determine the structure of H2CO3 in a wide pressure range (1-150 GPa).