Laser experiment hints at weird in-between ice
The odd state of matter may be found within icy planets like Neptune and Uranus
ICING OUT An unusual form of ice is made of a solid lattice of oxygen ions (circles in this illustration) through which hydrogen ions travel freely (pink trails), like a liquid. Signs of the strange substance, known as superionic ice, showed up in a laser experiment.
S. Hamel, M. Millot and J.Wickboldt/NIF-LLNL