Laser experiment hints at weird in-between ice

The odd state of matter may be found within icy planets like Neptune and Uranus

illustration of superionic ice

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

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