Citation: Christophe Muller; Jean-Louis Baudour; C\'edric Bedoya; Fran\,coise Bouree; Jean-Louis Soubeyroux; Marc Roubin (2000). Octahedral deformations and cationic displacements in the ferroelectric PbHf~0.8~Ti~0.2~O~3~: a neutron powder diffraction study from 10 to 770K. Acta Crystallographica Section B, 56, pp. 27-38.