Un nouvel exemple d'empilement ordonne a tres longue periode dans le systeme or-manganese: la `phase X' (Au11Mn4)
Acta Crystallographica Section A: Crystal Physics, Diffraction, Theoretical and General Crystallography
, Volume 32 (3): 415 – May 1, 1976
Abstract
A new example of long-period stacking order is described in the Au-Mn system for the composition Au11Mn4 (26.7 at. % Mn). The structure was determined by X-ray and electron diffraction and confirmed by neutron diffraction. The stacking order is the so-called 3R type in Sato's nomenclature Sato, Toth & Honjo, J. Phys. Chem. Solids, (1967). 28, 137-160. The structure includes 27 layers, building up a giant monoclinic cell containing 810 atoms. This phase undergoes a magnetic transition at about 140 K. As opposed to examples given by Sato et al. (1967), the Au11Mn4 structure is not based on a long- period superlattice with antiphase boundaries.
