Structure-property correlation over five phases and four transitions in Pb5Al3F19

S. C. Abrahams (1) , Jean Ravez (2) , H. Ritter (3) , J. Ihringer (3)

1 Physics Department
2 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux
3 Lehr und Forschungsbereich für Röntgen und Neutronenbeugung

The calorimetric and dielectric properties of Pb5Al3F19 in the five phases stable under ambient pressure are correlated with structure for fuller characterization of each phase. The first-order transition between ferroelectric phase V and antiferroelectric phase IV at TV,IV = 260 (5) K exhibits a thermal hysteresis of 135 (5) K on heating, with a maximum atomic displacement [Delta](xyz)max = 1.21 (6) Å; the transition from phase IV to ferroelastic phase III at 315 (5) K is also first order but with a thermal hysteresis of 10 (5) K...

Mots clés: Dielectric properties; Structure property correlation; Phase transitions; Calorimetry; Dielectric properties.

Domaines: Matériaux

S. C. Abrahams, Jean Ravez, H. Ritter, J. Ihringer. Structure-property correlation over five phases and four transitions in Pb5Al3F19. Acta Crystallographica Section B : Structural Science [1968-2013], 2003, 59 (5), pp.557-574. ⟨10.1107/S0108768103011509⟩. ⟨hal-00177103⟩