New Ice XXI Emerges When Water Is Crushed to Extreme Pressures

A microsecond freeze under crushing pressure has revealed Ice XXI, an entirely new form of ice. The Korea Research Institute of Standards and Science (KRISS, President Lee Ho Seong) has recorded water repeatedly freezing and melting at pressures above 2 gigapascals (2 GPa) while still at room temperature. These rapid cycles occurred within microseconds (μs, [...]