Earth and Planetary Science
EPS Geophysics

Experimental evidence for superionic water ice using shock compression

Thursday, May 3, 2018

Experimental evidence for superionic water ice using shock compression

Marius MillotSebastien HamelJ. Ryan RyggPeter M. CelliersGilbert W. CollinsFederica CoppariDayne E. FratanduonoRaymond JeanlozDamian C. Swift & Jon H. Eggert 

Nature Physics, volume 14pages 297302 (2018)

https://www.nature.com/articles/s41567-017-0017-4

In stark contrast to common ice, Ih, water ice at planetary interior conditions has been predicted to become superionic with fast-diffusing (that is, liquid-like) hydrogen ions moving within a solid lattice of oxygen. Likely to constitute a large fraction of icy giant planets, this extraordinary phase has not been observed in the laboratory. Here, we report laser-driven shock-compression experiments on water ice VII.