Abstract

Spin-lattice relaxation time ( T 1 ) and specific volume of trans-1,2-dichloroethylene were measured at high pressure. T 1 -pressure curves at various temperatures had one or two jumps, and pressure dependence of specific volume had also a singular point besides the solidification. Magnitude of the T 1 values and the compressibility indicated that the state is liquid above and below the singular points. It is confirmed that there are three liquid phases and the novel liquid phases are similar to the liquid crystals.

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