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À propos de : Pressure-Induced Phase Transition in PrAlO3        

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  • Pressure-Induced Phase Transition in PrAlO3
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  • PrAlO3 is shown to undergo a rhombohedral (R3̄c) to orthorhombic (Imma) phase transitionupon application of pressures of up to 9.1 GPa. The structures in both phases have beenrefined from high-resolution synchrotron diffraction data. The structure initially evolvestoward a higher-symmetry structure as the pressure is increased before ultimatelyundergoing a first-order transition to a lower-symmetry orthorhombic structure. Thisbehavior appears to be related to the change in the tilting of the AlO6 groups.
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