Optical Study of the Phase Transition in Phenanthrene Single Crystals

Abstract
A definite change i birefringence has been shown to accompany the solid-solid phase transition in solution-grown single as phenanthrene. The birefringence versus temperature data indicate and onset of the transition at around 45°C and a maximum rate of change at around 70[ddot]C,in agreement with other studies. The presence of a birefringence change somewhat relaxes the constraints on possible models for this transition.

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