| Budget Amount *help |
¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2014: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2013: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2012: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Outline of Final Research Achievements |
We investigated the intermediate stages toward the phase transition between liquid and solid phases of water. It is found that the melting and crystallization is not that simple, but many intermediate states and structures intervene the initial and final states. For example, in the process that ice melts when it is heated homogeneously, separation of pair defects play the crucial role. Methane bubbles in the dissociation process of methane hydrate, unknown metastable ice phase in the freezing process of ice VII, plastic ice and tricritical phenomena in the melting process of ice VII, are other examples of the newly discovered events in the phase transition processes. We also expand the theory of evaluating the stability of clathrate hydrates more precisely, and also propose a concept of generalized phase diagram to understand the polymorphism of clathrate hydrates.
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