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Fast vs Slow Water: Explaining the Fragile-to-Strong Transition
Fast vs Slow Water: Explaining the Fragile-to-Strong Transition

A Japanese research team led by The University of Tokyo investigated the fragile-to-strong transition of water. Unlike most liquids, when water is cooled, the rate of increase of its viscosity reaches a maximum at a certain low temperature. The team showed that modeling water as a temperature-dependent mixture of two states--disordered "fast" water and locally ordered "slow" water--explained the fragile-to-strong transition and avoided the faulty predictions of earlier theories based on glassy behavior.