engleski

Feroelastic properties of AlF3

A phase transition has been detected in AlF3 at TC = 725 ± 10 K by calorimetric, X-ray diffraction and optical measurements. The structural relation between the low and high temperature phases has allowed to predict this transition to be a ferroelastic-prototype one. The observation of ferroelastic domains under polarizing microscope and their disappearance above Curie temperature are in good agreement with this assumption. The thermal dependence of the spontaneous strain has been determined.

trifluoride ; feroelastic transition

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