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Figure 25 (a) Raman spectra of solid M3P7 (M = Li, Na, K, Rb, Cs) and (b) temperature-dependent Raman spectra of NasP , indicating the first-order phase transition at Tc from the low-temperature (LT) crystalline a-phase to the high-temperamre (HT) plastically crystalline /3-phase. Note the disappearing of the sharp external lattice modes just above Tc... [Pg.3687]

See other pages where HT plastics is mentioned: [Pg.3686] [Pg.504] [Pg.693]

HTS